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I encounter a very strange problem when using gnuplottex on my Win 7 32 bit system with MiKTeX 2.9 - gnuplot 4.6.3 & the latest gnuplottex release:




\begin{gnuplot}[terminal=pslatex,terminaloptions={dashed auxfile}]
set xlabel '\sz{Test x}'
plot sin(x)

Here are the last lines of my log file:

Opening gnuplot stream test-gnuplottex-fig1.gnuplot
runsystem(gnuplot test-gnuplottex-fig1.gnuplot)...executed.

Package gnuplottex Info: test-gnuplottex-fig1.gnuplot converted on input line 1

! Undefined control sequence.
\sz ->\small 

l.10 ...9,140){\makebox(0,0){\strut{}\sz{Test x}}}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

) [1] (D:\notebooks\data\cmds\test.aux) )

Was is going wrong here? This is weird, since some days ago it worked and it seems to me that I didn't change something...

If you just use


everything's fine.

The same message was encountered here: Gnuplottex basic example fails with 'undefined control sequence' but it was solved by updating the package.

Every suggestion is greatly appreciated!

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marked as duplicate by egreg, lockstep, Werner, Speravir, Andrew Swann Apr 29 '13 at 8:53

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

See Why should the minimal class be avoided? – egreg Apr 28 '13 at 12:05
@egreg: it should only be avoided when a font problem appears. In other cases it is very useful! – Herbert Apr 28 '13 at 12:26
up vote 5 down vote accepted

the documentclass minimal doesn't know anything about fontsize macros. Use article instead. However, \small has no argument, it is a switch. Use

{\sz Test x}  

And, by the way, the error message comes from LaTeX not Gnuplot

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