[OS X TeX] ! No room for a new \count .

[Martin Bergren]

Running Mactex 2016 on the  file 

===================================
\documentclass{beamer}
%\usepackage{etex}

% !TEX TS-program = xelatex
\usepackage{tikz}

\usepackage{microtype}
\usefonttheme{professionalfonts}
\usepackage[no-math]{fontspec}
\makeatletter
\let\Bbbk\@undefined
\makeatother
\usepackage{mtpro2}


\begin{document}
\begin{frame}{Hello}
Hello
\end{frame}

\end{document} 
===================================

gives the error message

(/usr/local/texlive/2016/texmf-dist/tex/latex/fontspec/fontspec.cfg)))
(/Users/martinb/Library/texmf/tex/latex/mtpro2/mtpro2.sty
! 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@
                                                  
? 

I don’t get the error when running Mactex 2015 or when uncommenting %\usepackage{etex}. According to a post in tex.stackexchange, the use of etex should be included in the kernel, so I don’t understand why it’s needed here. 

Note that I use the commercial mtpro2 package.

Cheers,



Martin Berggren
-------------------------------------------------------------------
Department of Computing Science, Umeå Universitet
Campustorget 5, S-901 87 Umeå, Sweden. Ph: +46-70-732 8111
http://www.cs.umu.se/~martinb, Martin.Berggren at cs.umu.se