On 22/01/2010 14:20, Philipp Stephani wrote: > Hello, > > mhsetup.sty (included by mathtools.sty) defines a few macros that expl3 wants to define anew, resulting in error messages. > > \documentclass{minimal} > \usepackage{mathtools}% or mhsetup > \usepackage{expl3}% error > \begin{document} > \null > \end{document} > > This results in the following errors: > > % This is a LaTeX bug: check coding! > % ! Command name `\if_num:w' already defined! Current meaning: \ifnum. > % \msg_kernel_bug:x ...oding!}\tex_errmessage:D {#1} > % > % l.56 \cs_new_eq:NN \if_num:w > % \tex_ifnum:D > > % This is a LaTeX bug: check coding! > % ! Command name `\if_case:w' already defined! Current meaning: \ifcase. > % \msg_kernel_bug:x ...oding!}\tex_errmessage:D {#1} > % > % l.57 \cs_new_eq:NN \if_case:w > % \tex_ifcase:D > > % ! This is a LaTeX bug: check coding! > % ! Command name `\if_dim:w' already defined! Current meaning: \ifdim > % > % For immediate help type H<return>. > % ... > % > % l.169 \cs_new_eq:NN \if_dim:w > % \tex_ifdim:D > > The macros \if_num:w, \if_dim:w, and \if_case:w are defined using \cs_new_eq:NN. Maybe you want to change this into \cs_set_eq:NN, or fix mhsetup.sty accordingly. > > Regards, > Philipp > Hello Philipp, This is because Morten's stuff has up to now used it's own expl3-like stuff internally. The team as a whole can't change things, unless of course Morten deputises the job to someone! -- Joseph Wright