Im using TexStudio in UTF8. the following codes
\documentclass{article}
\usepackage{siunitx}
\begin{document}
\num{0.12368455}
\num[round-mode=places,round-precision=4]{0.12368455}
\end{document}
are producing the error
siunitx.sty Line 258 Undefined control sequence }
siunitx.sty Line 258 Missing \begin{document} }
I used the package siunitx the first time, so i had to install it via the auto-window after running the file. Then i deletet the package and reinstalled it via miktex-package-manager (as admin). I got the same error.
Someone have an idea?