Hello,
I get the beta-functions in terms of traces over SM Yukawa couplings.
I did not find any way to compute these traces in the code.

I would appreciate any hint on this point.
Best wishes,

I don't understand the question. A trace is: a trace. It's just a symbol SARAH introduces to write the RGEs in the standard form.

If you want to run the RGEs numerically, you can use either this option http://stauby.de/sarah_wiki/index.php?t ... athematica or you can bring the Mathematica output yourself into the format you want to have it for further usage.