I can not use the font MinionPro anymore, but have no idea what is wrong. The following code
\documentclass[]{scrbook}
\usepackage{MinionPro}
\begin{document}
\begin{equation}
c = a + b
\end{equation}
\end{document}
produces the error
Trying to make PK font MinionPro-Regular-Base-aa at 597 DPI...
Running miktex-makemf.exe...
miktex-makemf: The MinionPro-Regular-Base-aa source file could not be found. Running ttf2pk.exe...
)
!pdfTeX error: pdflatex (file MinionPro-Regular-Base-aa): Font MinionPro-Regula
r-Base-aa at 597 not found
==> Fatal error occurred, no output PDF file produced!
miktex-makepk: PK font MinionPro-Regular-Base-aa could not be created.
What is wrong here?
The filedatabase was recreated and I called initexmf --mkmaps