Shared system runtime libraries (like Intel OpenMP runtime libraries) can conflict with the version shipped by Ansys. Step-by-Step Fixes to Resolve the Error 1. Reset the Ansys User Profile (Most Effective)
Follow these troubleshooting methods in order from the most common, non-invasive solutions to deeper system adjustments. 1. Clear and Reset Ansys Application Data
Temporarily disable potential conflicts to identify the root cause: Shared system runtime libraries (like Intel OpenMP runtime
The error appears even on simple static structural models that previously worked. Diagnostic files are written but are zero bytes.
The crash occurs during the “Assembling Model” phase or the first nonlinear iteration. The crash occurs during the “Assembling Model” phase
The error message "ansyswbu.exe encountered a problem. A diagnostic file has been written"
The most crucial part of the error message is the phrase: “a diagnostic file has been written.” This file is not an error log in the traditional sense; it is a memory dump (often with a .dmp extension) or a detailed crash report. Its location is typically in the user’s temporary folder or the project’s solve directory (e.g., C:\Users\[Username]\AppData\Local\Temp\ or [Project Folder]_files\dp0\SYS\MECH\ ). non-invasive solutions to deeper system adjustments.
Exceeding standard Windows 248-character file thresholds or using non-ASCII syntax symbols.
Windows updates or abrupt software terminations overwrite and corrupt temporary simulation profile settings.