[OS X TeX] Conflict between mtpro2 and mhchem

[Themis Matsoukas]

This may be a known issue but I encountered it just recently. In TeX Live 2016 there is a conflict between the packages mhchem and mtpro2. The sample file below upon compilation gives the error message:

/Users/themis/Library/texmf/tex/latex/mtpro2/mtpro2.sty:131: No room for a new 
\count .
\ch at ck ...\else \errmessage {No room for a new #3}
                                                  \fi 
l.131 \alloc at 0\count\countdef\insc at unt\pointcount@

The conflict disappears if mhchem is loaded after mtpro2. 

%-------------------------------------------------------------
\documentclass{memoir}
\renewcommand{\rmdefault}{ptm} 
\usepackage[version=4]{mhchem}
\usepackage[lite,subscriptcorrection,nofontinfo]{mtpro2}

\begin{document}

Testing conflict between \texttt{mhchem} and \texttt{mtpro2}: 

\begin{equation*}
   \ce{(NH4)2S} 
\end{equation*}

\end{document} 
%-------------------------------------------------------------


Themis
tmatsoukas at iCloud.com