Am Fri, 18 Nov 2016 11:49:08 +0200 schrieb Johann Spies:
> ! Missing number, treated as zero.
> <to be read again>
> \protect
> \renewcommand{\mag}[1]{\textcolor{magenta}{#1}}
\mag is a primitive command (an integer) and it is quite a bad idea
to redefine it.
--
Ulrike Fischer
http://www.troubleshooting-tex.de/