Ansyswbu.exe Encountered A Problem. A Diagnostic File Has Been Written Today
If the crash occurs during solving:
The diagnostic file mentioned in the error message is typically written to your Windows temporary folder (e.g., %temp%). While the file itself is highly technical, the error generally stems from one of the following: If the crash occurs during solving: The diagnostic
If the error persists after all troubleshooting steps, gather the following and open a support ticket: This is the #1 fix for GUI-related crashes
If the crash happens when importing geometry: close other apps
Add exclusions for:
| Symptom / Exception | Likely cause | Fix |
|-------------------------------|----------------------------------------|----------------------------------------------------------------------|
| ACCESS_VIOLATION | Graphics driver / corrupted memory | Update GPU driver, disable "Use GPU acceleration" in Tools → Options |
| Fatal error in mesher | Poor geometry / mesh settings | Simplify geometry, change meshing method to Tetrahedrons |
| ansyswbu.exe crashes on open| Corrupted Workbench config | Delete %APPDATA%\Ansys\v2xx\WB.xml |
| Crash during solving (Mechanical APDL) | Not enough RAM / disk space | Increase pagefile, close other apps, reduce mesh size |
| Stack overflow | Recursive loops in commands / large model | Add *go,start or increase stack size via bcsoption |
This is the #1 fix for GUI-related crashes.