Maybe I´m missing something. I played around with the Nurbs toolset and notice that I cannot convert to polygons a pasted surface that has a trimmed geometry as its Feature/Spawn surface. Converting just a trimmed surface works fine though.

Is it supposed to work?

Hmmmm… the only way I can get it to work is by using an unpaste sop first but then you loose the two surfaces don't join up so nicely. Looks like a bug or a lack of a feature to me.

Yeah I was thinking the same but didnt know if its a bug or as you say a lack of feature. I was kind of expecting it to work since it works fine in the Paste itself and Convert SOP has allways worked in most other cases. Perhaps someone in the development could elaborate on it?