Clash between czt.sty and koma-script

[Frank Dordowsky]

When using the theorem environment in the Koma-Script class scrartcl, I get the following error:

Class scrartcl Error: undefined old font command `\rm'.

together with a lengthy description. It basically complains that the font command \rm is deprecated. Below a minimal example:

\documentclass{scrartcl}
\usepackage[mathrm,colour,cntbysection]{czt}

\begin{document}

\begin{theorem}{Crash here}
   \vdash \forall n : \nat @ n+1 > n
\end{theorem}

\end{document}

The work-around is to use the class option "enabledeprecatedfontcommands", but that may be deprecated also in the future. Are there other options?

Thanks in advance

[Frank Dordowsky]

I tried option 'nosf' but get the

LaTeX Error: Unknown option `nosf' for package `czt'.

My czt.sty file has version v.1.4 of 2015/07/23, I could not find a
newer file.

I have abandoned my attempt to replace fuzz by czt.