General ⇒ Problem with achemso

[Meternagel]

Hi there,

I learning to use LATEX right now with the texlive Distribution on my DEBIAN computer. In order to learn how to publish an article, I downloaded the package "achemso". Now that I try to run the achemso-demo.tex file, I get the following ERROR:

Code: Select all

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! LaTeX error: "kernel/command-not-defined"
! 
! Control sequence \str_case:nnn undefined.
! 
! See the LaTeX3 documentation for further information.
! 
! For immediate help type H <return>.
!...............................................  
                                                  
l.97 \cs_generate_variant:Nn \str_case:nnn
                                           { Vnn }
?     
! Emergency stop.
!...............................................  
                                                  
l.97 \cs_generate_variant:Nn \str_case:nnn
                                           { Vnn }
No pages of output.

The last output-line in the Terminal before the error was:

Code: Select all

(/usr/share/texlive/texmf-dist/tex/latex/l3kernel/l3luatex.sty))

And finally the last few lines of the .log file:

Code: Select all

(/usr/share/texlive/texmf-dist/tex/latex/l3kernel/l3luatex.sty
Package: l3luatex 2012/02/09 v3355 L3 Experimental LuaTeX-specific functions
\g_cctab_allocate_int=\count186
\g_cctab_stack_int=\count187
))
\__mhchem_option_version_int=\count188
Variant \str_if_eq:VnTF already defined; not changing it on line 94


!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! LaTeX error: "kernel/command-not-defined"
! 
! Control sequence \str_case:nnn undefined.
! 
! See the LaTeX3 documentation for further information.
! 
! For immediate help type H <return>.
!...............................................  
                                                  
l.97 \cs_generate_variant:Nn \str_case:nnn
                                           { Vnn }
? 
! Emergency stop.
!...............................................  
                                                  
l.97 \cs_generate_variant:Nn \str_case:nnn
                                           { Vnn }
|'''''''''''''''''''''''''''''''''''''''''''''''
| This is a coding error.
| 
| LaTeX has been asked to use a command \str_case:nnn, but this has not been
| defined yet.
|...............................................

Can somebody help me? I appreciate any help.
Thank you.

Meternagel

[Johannes_B]

Crosspost to our german forum goLaTeX

[josephwright]

Achemso doesn't use expl3 at all, so you mus have something else going on. It looks like a package version mismatch, but without some code it's impossible to say.