Dear Mr. Sennewald,

Thank you very much! You gave the final hint to solve the problem! And I already believed in a bug...
As you said, there is no semiconductor device in my circuit. In fact, what you had was the whole circuit... only one line was missing: the line which indicates what library I use. After deleting it, my circuit worked!
I guess, my capacity Cubk (which should mean "C unbekannt" (= "C unknown") ) had the same name as any of my models in a library. I will look for it.

Thank you very much for your help!

Truly Yours

Bernhard

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