Problem found: NOT OpenModelica did cause it.

The PC used a tool called "Driver Mender" to search for driver updates. After removing Driver Mender, OpenModelica doesn't cause blue screens anymore :-)

Martin, thanks for the quick hints!

Best regards, Leo

Thanks for the hints, we'll check the PC. Strangely, it was 100% reproducable when opening OpenModelica. There was no crash of other applications.

We have a PC with Windows XP SP3 which has been used with various versions of OpenModelica.
Since today, it crashes with a blue screen "IRQL_not_less_or_equal" when opening OpenModelica.
We use OpenModelica 1.8.1 (release version).

This happens for both "OpenModelica Shell" and "OpenModelica Connection Editor".
Any hints what could cause the Windows crash?

Thanks in advance!

Best regards,
Leo