Thanks for the recomendation, Alexei, I will try to be more consistent with these things.
However, this has not fixed te problem.
I read earlier about debugging script extensions, but couldn't make it work. I will try again, but I have used these commands as regular project scripts and they all worked fine.
It is when I tried to pack them in a Script Extension that I started seeing this error, so I suspected that it was either something wrong with the Description file or something more related to the ScriptExtensions functionality that I was not aware of ...
