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 seems you also submitted this problem to the support channel. Let's continue discussing there. Most important question is whether you can upgrade to a more recent version of Xpress and whether the issue persists.
