Forum Discussion
Solver (xpress) returned non-zero return code (3221225477) and EXCEPTION_ACCESS_VIOLATION
Has anyone run into issues with "ERROR: Solver (xpress) returned non-zero return code (3221225477)" and "ERROR within optimization The optimizer has encountered an unexpected exception: 0xc0000005 (E...
It looks like the solver crashed, which would be a bug in the solver. How exactly are you invoking the solver? From the console? From Mosel? From an application? In another way? Can you share the model that triggers this problem?
You are using version 8.8 which is rather old. Can you upgrade to a more recent version? There are chances that the bug is already fixed there.
