Press Win + R , type %appdata% , and click Enter. Locate the folder named Ansys . Inside, find your specific version folder (e.g., v241 , v232 , v190 ) and rename it to vXXXX_old .
Sometimes, a previous crash leaves behind lock files that prevent the project from opening properly. Navigate to your project folder. Locate the folder named projectname_files . Look for a folder named dp0 (design point 0). Inside dp0 , look for mechanical or fluent directories. Delete any files ending in .lock or .lck . 3. Clear the Ansys Temporary Cache
The ansyswbuexe process is the core executable for the ANSYS Workbench user interface. When it crashes and generates a diagnostic file, it usually means there is a conflict between the software and your system environment, hardware drivers, or corrupted temporary data. 1. Clear Your AppData (The "Soft Reset")
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\ ).
Rename this folder to to backup your original settings. Press Win + R , type %appdata% , and click Enter
Corrupted user preference files frequently prevent the Mechanical executable ( ansyswbuexe ) from launching properly. Resetting these configuration folders restores default settings without deleting your project files. Close all active ANSYS programs and processes. Open the Windows File Explorer. In the address bar, type %appdata% and press . Locate the folder named Ansys .
Certain advanced settings can crash the solver reliably. For example, enabling “Large Deflection” on a model with poorly constrained degrees of freedom may cause the solver to iterate to infinity. Using a direct solver (e.g., Sparse) on a model with billions of degrees of freedom will exhaust memory faster than an iterative solver. Requesting unrealistic time steps in a transient analysis can also lead to numerical overflow. Solution: Simplify the analysis first. Start with linear, static, small-deflection assumptions. Gradually add complexity while saving intermediate results.
ANSYS is a powerful software suite used for engineering simulation and design optimization. However, like any complex software, it's not immune to errors and issues. One such error that users may encounter is the "Ansyswbuexe encountered a problem a diagnostic file has been written new" error. In this article, we'll explore the possible causes of this error, its implications, and provide step-by-step troubleshooting steps to resolve the issue.
: Locate the folder named Ansys . Inside, you will see version subfolders like v241 or v242 . Step 4 : Rename the main Ansys folder to Ansys_OLD . Sometimes, a previous crash leaves behind lock files
A common fix is to reset ANSYS Workbench's user-specific settings and caches. This will not delete your saved projects:
: Open the ANSLIC_ADMIN Utility as an administrator, stop the Ansys license, and then start it again.
Install the latest "Studio" or "Enterprise" drivers for your GPU (NVIDIA/AMD) rather than "Game Ready" drivers.
The error message is one of the most common and frustrating generic crash errors in Ansys Workbench. It typically triggers when opening Ansys Mechanical, DesignModeler, or the Meshing module , forcing the program to close and generating a .dmp (memory dump) file in your local temporary directory. Look for a folder named dp0 (design point 0)
First, note the exact time of the crash. Then navigate to the project directory and copy the diagnostic file(s) to a safe location.
If found, rename it to libiomp5md.dll.old (Ansys will then use its own internal version of this file instead).
Yet, for most users, that “diagnostic file” is an arcane tome — full of memory addresses, thread dumps, and cryptic error codes that require an ANSYS support ticket or a PhD in debugging to interpret.
Follow these structured isolation procedures starting with low-impact file operations. 1. Reconstruct Corrupted User Profiles