Ansyswbu.exe Encountered A Problem. A Diagnostic File Has Been Written Jun 2026

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:

The error is a generic crash message indicating that Ansys Mechanical has failed to initialize or has crashed during an operation. This typically occurs due to corrupted temporary files, missing system components, or incorrect user settings. Step 1: Clear Cached Configuration Files

Stop and restart the ANSYS license service, ensuring you are running as an administrator. Summary Checklist for Troubleshooting Potential Cause Suggested Action Duplicate the project and clear generated data. Corrupted Config Rename %appdata%\Ansys and %temp% folders. Graphics Driver Update to the latest Enterprise/Production driver. File Path Errors Move project to a local, simple path (e.g., C:\ ). Memory/Solver Limit Reduce mesh size or allocate more RAM in Mechanical.

Click and browse to find ansyswbu.exe (usually located in C:\Program Files\ANSYS Inc\vXXX\Framework\bin\Win64\ ). The diagnostic file mentioned in the error message

Ensure there are no spaces, non-English characters, or special symbols ( @ , # , $ , etc.) in your file path or Windows username. ANSYS solvers are built on legacy frameworks that struggle to parse non-ASCII characters. 5. Analyze the Diagnostic File

If the crash happens immediately upon opening any project (even a blank one), your installation might be corrupted.

If you cannot interpret the file, save it and contact ANSYS Support—they will ask for it. Step 1: Clear Cached Configuration Files Stop and

Right-click on your desktop and open the (or AMD Software). Navigate to Manage 3D Settings > Program Settings .

%temp% (e.g., C:\Users\[YourUsername]\AppData\Local\Temp)

Sometimes the saved "view" or window layout of Mechanical gets corrupted. or special symbols ( @

The error is one of the most common and frustrating crashes in ANSYS Workbench. It indicates that the main Workbench executable ( ansyswbu.exe ) unhandled an exception and terminated abruptly. Because this is a generic crash message, the root cause can range from corrupted user preferences to deep-seated graphics driver conflicts.

To see if the GPU is the culprit, try launching ANSYS in "Software Rendering" mode by adjusting the display settings in the Workbench CAD Configuration Manager. 3. Check for Workspace/Layout Corruption