# microtype has issues with mathdesign \mathsf font [closed]

I am using

\documentclass{amsart}
\usepackage{microtype}
\usepackage[bitstream-charter,cal=cmcal]{mathdesign}

Sometimes \mathsf{...} produces

pdfTeX error (font expansion): auto expansion is only possible with scalable fonts.

Appears when the \mathsf is typeset in the end of a line and only with certain characters (e.g. P,..).

So, which fonts does mathdesign use for \mathsf? Should I replace it with other font? Suggestions? Solutions?

minimal 'working' example:

\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage{microtype}
\usepackage[bitstream-charter]{mathdesign}

\begin{document}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi sdf$\mathsf P$ elementum, elit in varius viverra, mauris augue cursus purus, vel ullamcorper nisi orci pretium nunc.
\end{document}

This example is minimal, i.e. dropping \usepackage[T1]{fontenc} avoids the error.

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Welcome to TeX.sx! Could you please extend your code snippet into a minimal working example (MWE) that reproduces the error? –  cgnieder Apr 22 '13 at 17:33
Your MWE runs without errors on my machine (microtype 2013/03/13 v2.5 and mathdesign 2006/01/29 v1.55) –  cgnieder Apr 22 '13 at 18:30
Version 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian) (format=pdflatex 2012.12.23), fontenc 2005/09/27 v1.99g, microtype 2010/01/10 v2.4, mathdesign 2006/01/29 v1.55 –  DCh Apr 22 '13 at 18:50
this looks like you should update microtype. –  cgnieder Apr 22 '13 at 19:25
fontenc 2005/09/27 v1.99g, microtype 2013/03/13 v2.5, mathdesign 2006/01/29 v1.55 - the same error massage –  DCh Apr 22 '13 at 21:07

## closed as too localized by lockstep, Andrew Swann, Martin Schröder, Claudio Fiandrino, zerothApr 24 '13 at 14:05

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I can not confirm that. \usepackage[T1]{fontenc} \usepackage[bitstream-charter]{mathdesign} ... S\textsf{S}$\mathsf{S}$ gives this \usepackage[bitstream-charter]{mathdesign} \usepackage[T1]{fontenc} ... this Installing cm-super solves the issue though. (But the sans serif font is still in wrong scale.) Seems like cm-super font is not included in 'standard' TeX setup.. Could someone explain what is going on and how to properly use sans serif fonts with mathdesign? –  DCh Apr 24 '13 at 13:51