*Update
Complete crash in VPC/W98SE, but:
Runs also in VPC/W98SE -> restart in dosmode and with a loaded dos-mousedriver.
Much, much too fast, but runs.
What a weird situation.
Crash in VPC/Dos6.22 but runs in VPC/Dos7.
I begin to suspect the mouse driver, the one I used in VPC/Dos7 is the one from the old caldera dos, in Dos6.22 I use the old Imouse from logitech.