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

That message means ANSYS (ansyswbu.exe) crashed and wrote a diagnostic (crash) file. Try these steps to diagnose and fix it:

Understanding the Diagnostic File

This article provides a deep dive into the meaning of this error, where to find the diagnostic file, and—most importantly—a step-by-step methodology to resolve it permanently. That message means ANSYS (ansyswbu

Some users find success by adding a system environment variable ANS_OLD_ATTACH = 1 to bypass specific geometry attachment errors. Ansys Innovation Space If the problem persists, check for special characters where to find the diagnostic file

Step 2: Reproduce the Crash

• Update your NVIDIA/AMD/Intel graphics driver directly from the manufacturer's website (not Windows Update).
• In Workbench: Tools > Options > Appearance → Set "Graphics Rendering" to Software (OpenGL fallback) or Direct3D as a test.
• If the error disappears, switch back to hardware acceleration after a driver update.