Thank you Dragan!

set console on was the solution.

I have SET CONSOLE OFF at the very beginning of the main prg like since forever. I sure don't understand why, but it works again.

Thank you!
Gerhard

>>Thank you for your answer, Lutz.
>>
>>This happens before any form is activated. I checked _SCREEN.AllowOutput and that is .T.. I'm afraid, it is something different.
>>
>>Any other idea, please!
>
>set console on