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! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {alpha}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {alpha}}\str_lowercase:f 
                                                  {\tl_tail:n {alpha}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {alpha}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {alpha}}\str_lowercase:f 
                                                  {\tl_tail:n {alpha}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {beta}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {beta}}\str_lowercase:f 
                                                  {\tl_tail:n {beta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {beta}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {beta}}\str_lowercase:f 
                                                  {\tl_tail:n {beta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {gamma}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {gamma}}\str_lowercase:f 
                                                  {\tl_tail:n {gamma}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {gamma}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {gamma}}\str_lowercase:f 
                                                  {\tl_tail:n {gamma}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {delta}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {delta}}\str_lowercase:f 
                                                  {\tl_tail:n {delta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {delta}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {delta}}\str_lowercase:f 
                                                  {\tl_tail:n {delta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {epsilon}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {epsilon}}\str_lowercase:f 
                                                  {\tl_tail:n {epsilon}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {epsilon}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {epsilon}}\str_lowercase:f 
                                                  {\tl_tail:n {epsilon}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {zeta}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {zeta}}\str_lowercase:f 
                                                  {\tl_tail:n {zeta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {zeta}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {zeta}}\str_lowercase:f 
                                                  {\tl_tail:n {zeta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {eta}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {eta}}\str_lowercase:f 
                                                  {\tl_tail:n {eta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {eta}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {eta}}\str_lowercase:f 
                                                  {\tl_tail:n {eta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {theta}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {theta}}\str_lowercase:f 
                                                  {\tl_tail:n {theta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {theta}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {theta}}\str_lowercase:f 
                                                  {\tl_tail:n {theta}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {iota}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {iota}}\str_lowercase:f 
                                                  {\tl_tail:n {iota}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {iota}}\str_lowercase:f {\tl_tai...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...{\tl_head:n {iota}}\str_lowercase:f 
                                                  {\tl_tail:n {iota}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {kappa}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {kappa}}\str_lowercase:f 
                                                  {\tl_tail:n {kappa}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {kappa}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {kappa}}\str_lowercase:f 
                                                  {\tl_tail:n {kappa}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {lambda}}\str_lowercase:f {\tl_t...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...tl_head:n {lambda}}\str_lowercase:f 
                                                  {\tl_tail:n {lambda}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {lambda}}\str_lowercase:f {\tl_t...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...tl_head:n {lambda}}\str_lowercase:f 
                                                  {\tl_tail:n {lambda}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {mu}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {mu}}\str_lowercase:f 
                                                  {\tl_tail:n {mu}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {mu}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {mu}}\str_lowercase:f 
                                                  {\tl_tail:n {mu}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {nu}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {nu}}\str_lowercase:f 
                                                  {\tl_tail:n {nu}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {nu}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {nu}}\str_lowercase:f 
                                                  {\tl_tail:n {nu}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {xi}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {xi}}\str_lowercase:f 
                                                  {\tl_tail:n {xi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {xi}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {xi}}\str_lowercase:f 
                                                  {\tl_tail:n {xi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {omikron}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {omikron}}\str_lowercase:f 
                                                  {\tl_tail:n {omikron}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {omikron}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {omikron}}\str_lowercase:f 
                                                  {\tl_tail:n {omikron}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {pi}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {pi}}\str_lowercase:f 
                                                  {\tl_tail:n {pi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {pi}}\str_lowercase:f {\tl_tail:...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...f {\tl_head:n {pi}}\str_lowercase:f 
                                                  {\tl_tail:n {pi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {rho}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {rho}}\str_lowercase:f 
                                                  {\tl_tail:n {rho}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {rho}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {rho}}\str_lowercase:f 
                                                  {\tl_tail:n {rho}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {sigma}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {sigma}}\str_lowercase:f 
                                                  {\tl_tail:n {sigma}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {sigma}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {sigma}}\str_lowercase:f 
                                                  {\tl_tail:n {sigma}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {tau}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {tau}}\str_lowercase:f 
                                                  {\tl_tail:n {tau}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {tau}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {tau}}\str_lowercase:f 
                                                  {\tl_tail:n {tau}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {upsilon}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {upsilon}}\str_lowercase:f 
                                                  {\tl_tail:n {upsilon}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {upsilon}}\str_lowercase:f {\tl_...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...l_head:n {upsilon}}\str_lowercase:f 
                                                  {\tl_tail:n {upsilon}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {phi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {phi}}\str_lowercase:f 
                                                  {\tl_tail:n {phi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {phi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {phi}}\str_lowercase:f 
                                                  {\tl_tail:n {phi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {chi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {chi}}\str_lowercase:f 
                                                  {\tl_tail:n {chi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {chi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {chi}}\str_lowercase:f 
                                                  {\tl_tail:n {chi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {psi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {psi}}\str_lowercase:f 
                                                  {\tl_tail:n {psi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {psi}}\str_lowercase:f {\tl_tail...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ... {\tl_head:n {psi}}\str_lowercase:f 
                                                  {\tl_tail:n {psi}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> Chem\str_uppercase:f 
                                {\tl_head:n {omega}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {omega}}\str_lowercase:f 
                                                  {\tl_tail:n {omega}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {omega}}\str_lowercase:f {\tl_ta...
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {omega}}\str_lowercase:f 
                                                  {\tl_tail:n {omega}}
l.584 \chemgreek_drop_symbols:
                              
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

)
\l__mhchem_ce_distanceFromLastComma_int=\count272
\__mhchem_arrow_extPgfLength_skip=\skip57
\mhchem@minispace@tmp=\skip58
\mhchem@minibackspace@tmp=\skip59
\mhchem@bondwidth=\skip60
\mhchem@bondheight=\skip61
\mhchem@smallbondwidth@tmpA=\skip62
\mhchem@smallbondwidth@tmpB=\skip63
\mhchem@smallbondwidth=\skip64
\mhchem@bondtmp@minussidebearingleft=\skip65
\mhchem@bondtmp@minussidebearingright=\skip66
\l__mhchem_option_version_int=\count273
\mhchem@option@minusmathsidebearingleft=\dimen178
\mhchem@option@minusmathsidebearingright=\dimen179
\mhchem@option@minustextsidebearingleft=\dimen180
\mhchem@option@minustextsidebearingright=\dimen181
)
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/geometry\geometry.
sty"
Package: geometry 2020/01/02 v5.9 Page Geometry

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/iftex\ifvtex.sty
"
Package: ifvtex 2019/10/25 v1.7 ifvtex legacy package. Use iftex instead.
 ("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/iftex\iftex.sty
"
Package: iftex 2019/11/07 v1.0c TeX engine tests
))
\Gm@cnth=\count274
\Gm@cntv=\count275
\c@Gm@tempcnt=\count276
\Gm@bindingoffset=\dimen182
\Gm@wd@mp=\dimen183
\Gm@odd@mp=\dimen184
\Gm@even@mp=\dimen185
\Gm@layoutwidth=\dimen186
\Gm@layoutheight=\dimen187
\Gm@layouthoffset=\dimen188
\Gm@layoutvoffset=\dimen189
\Gm@dimlist=\toks23

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/geometry\geometry.
cfg")) (test.aux)
\openout1 = `test.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 12.
LaTeX Font Info:    ... okay on input line 12.
LaTeX Font Info:    Trying to load font information for T1+lmr on input line 12
.

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/lm\t1lmr.fd"
File: t1lmr.fd 2009/10/30 v1.6 Font defs for Latin Modern
)
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/context/base/mkii\supp-p
df.mkii"
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count277
\scratchdimen=\dimen190
\scratchbox=\box52
\nofMPsegments=\count278
\nofMParguments=\count279
\everyMPshowfont=\toks24
\MPscratchCnt=\count280
\MPscratchDim=\dimen191
\MPnumerator=\count281
\makeMPintoPDFobject=\count282
\everyMPtoPDFconversion=\toks25
)
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/epstopdf-pkg\epsto
pdf-base.sty"
Package: epstopdf-base 2019/11/24 v2.7 Base part for package epstopdf

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/oberdiek\infware
rr.sty"
Package: infwarerr 2016/05/16 v1.4 Providing info/warning/error messages (HO)
)
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/oberdiek\grfext.st
y"
Package: grfext 2016/05/16 v1.2 Manage graphics extensions (HO)

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/oberdiek\kvdefin
ekeys.sty"
Package: kvdefinekeys 2016/05/16 v1.4 Define keys (HO)

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/oberdiek\ltxcmds
.sty"
Package: ltxcmds 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
)))
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/oberdiek\kvoptions
.sty"
Package: kvoptions 2016/05/16 v3.12 Key value format for package options (HO)

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/oberdiek\kvsetke
ys.sty"
Package: kvsetkeys 2016/05/16 v1.17 Key value parser (HO)

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/oberdiek\etexcmd
s.sty"
Package: etexcmds 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)

("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/generic/iftex\ifluatex.s
ty"
Package: ifluatex 2019/10/25 v1.5 ifluatex legacy package. Use iftex instead.
))))
("C:\Users\Simon\AppData\Local\Programs\MiKTeX 2.9\tex/latex/pdftexcmds\pdftexc
mds.sty"
Package: pdftexcmds 2019/11/24 v0.31 Utility functions of pdfTeX for LuaTeX (HO
)
Package pdftexcmds Info: \pdf@primitive is available.
Package pdftexcmds Info: \pdf@ifprimitive is available.
Package pdftexcmds Info: \pdfdraftmode found.
)
Package epstopdf-base Info: Redefining graphics rule for `.eps' on input line 4
42.
Package grfext Info: Graphics extension search list:
(grfext)             [.pdf,.png,.jpg,.mps,.jpeg,.jbig2,.jb2,.PDF,.PNG,.JPG,.JPE
G,.JBIG2,.JB2,.eps]
(grfext)             \AppendGraphicsExtensions on input line 460.
)
! Undefined control sequence.
<argument> chem\str_uppercase:f 
                                {\tl_head:n {alpha}}\str_lowercase:f {\tl_ta...
l.12 \begin{document}
                     
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {alpha}}\str_lowercase:f 
                                                  {\tl_tail:n {alpha}}
l.12 \begin{document}
                     
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> chemgreek_\str_uppercase:f 
                                      {\tl_head:n {alpha}}\str_lowercase:f {...
l.12 \begin{document}
                     
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
<argument> ...\tl_head:n {alpha}}\str_lowercase:f 
                                                  {\tl_tail:n {alpha}}:
l.12 \begin{document}
                     
(That makes 100 errors; please try again.) 
Here is how much of TeX's memory you used:
 15611 strings out of 492484
 289005 string characters out of 3121601
 356240 words of memory out of 3000000
 19844 multiletter control sequences out of 15000+200000
 536091 words of font info for 26 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 52i,1n,69p,381b,317s stack positions out of 5000i,500n,10000p,200000b,50000s

!  ==> Fatal error occurred, no output PDF file produced!