The most common fix. Moldflow creates thousands of small files during solving; a cluttered temp folder causes crashes.
Because 99998 is a generic crash code, there is rarely a single "fix." However, the error almost always stems from one of three categories: autodesk moldflow error 99998 full
While obvious, start here. Moldflow analysis files (.mfr, .m3r, .ow3) can grow very large—sometimes 50–200 GB for complex 3D warp analyses. The most common fix
What to do:
Important: Moldflow creates multiple temporary files during solving. Even if your project drive has space, the system temp drive might be full. While obvious, start here
If you try to run an analysis that overwrites an existing .mfr result file that is either: