My document isn't compiling anymore as soon as I use a fraction as fontsize in \documentclass[fontsize=10.5pt]{scrartcl}. Compilation breaks at \usepackage[onehalfspacing]{setspace} with the error message

Missing \begin{document}.
  • You need package scrhack as well.
    – Johannes_B
    Dec 27, 2015 at 12:12

2 Answers 2


You need to load package scrhack in order to get onehalfspacing to work with non-integr font sizes.


    \KOMAoptions{fontsize=10pt} M \par M &
    M  \par M&
    \KOMAoptions{fontsize=11pt}M  \par M
  • this doesn't compile and brings up the same error message at line 6: Missing \begin{document}. \begin Dec 28, 2015 at 8:00
  • @user3105453 If this would not compile, i wouldn't have posted it as an answer. Do you have an up to date TeX distribution?
    – Johannes_B
    Dec 28, 2015 at 8:43
  • I just updated from TeX Live 2014 to 2015 and now it's compiling without errors, thanks. The answer below, however, works even with older distributions. Dec 28, 2015 at 11:41

Instead of \usepackage[onehalfspacing]{setspace} simply use these lines:


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