Ansyswbu.exe Encountered A Problem. A Diagnostic File Has Been Written < DIRECT – ROUNDUP >

Guide: Troubleshooting "ansyswbu.exe Encountered a Problem"

This guide is designed to help you resolve the crash error: "ansyswbu.exe encountered a problem. A diagnostic file has been written."

This error typically occurs when launching Ansys Workbench or performing specific operations within it. It usually indicates issues with configuration files, graphics drivers, or corrupted installation files.

Follow the steps below in order to resolve the issue.

Step 5: Adjust Memory Allocation Settings

If the crash occurs during solving:

  1. In Workbench, go to Tools > Solve Process Settings.
  2. Under Advanced, reduce "Memory Available for Solver" to 70-80% of your physical RAM (e.g., from 16 GB to 12 GB).
  3. Uncheck "Use GPU acceleration" if enabled (some GPU drivers cause ansyswbu.exe to hang).

What is ansyswbu.exe?

ansyswbu.exe is the core executable file for the ANSYS Workbench user interface (WBU). It manages the project schematic, data integration between various analysis systems (like Mechanical, Fluent, CFX), and the overall workflow environment. When this executable crashes, the entire Workbench platform becomes unresponsive or closes abruptly.

2. Parse the diagnostic file for clues (Python snippet)

If you want to automatically extract crash reason from the diagnostic file:

import re
import os

def parse_ansys_diagnostic(file_path):
"""Extract error type, module, and call stack from ANSYS diagnostic file."""
if not os.path.exists(file_path):
return "Diagnostic file not found." Guide: Troubleshooting "ansyswbu


with open(file_path, 'r', errors='ignore') as f:
    content = f.read()
# Common patterns in ANSYS crash logs
patterns = exe))',
    'Exception Offset': r'Exception offset: (0x[0-9A-Fa-f]+)',
    'Call Stack': r'Call stack:\s*(.+?)(?=\n\n
results = {}
for key, pat in patterns.items():
    match = re.search(pat, content, re.DOTALL | re.IGNORECASE)
    if match:
        results[key] = match.group(1).strip()
return results



5. Prevent recurrence


    

  • Increase virtual memory → System Properties → Advanced → Performance → Advanced → Change to 2× RAM.
    • 

  • Update ANSYS to latest service pack.
    • 

  • Test with a simple model to rule out project‑specific corruption.
    • 

  • Disable "Use Distributed Solving" for local runs.
    • 



If the crash persists, share the extracted Exception Code and Fault Module from the diagnostic file — that usually pinpoints the root cause (e.g., nvoglv64.dll → NVIDIA driver issue; libansys.dll → corrupted installation).


"ansyswbu.exe encountered a problem. A diagnostic file has been written"


is a general application crash in ANSYS Mechanical or DesignModeler. It often occurs due to corrupted user profiles, graphics driver conflicts, or unregistered Windows components. Quick Fixes Try these low-impact steps first: Restart and Relaunch : Restart your computer to clear any lingering processes. Run as Administrator : Right-click the Workbench icon and select Run as Administrator to ensure sufficient permissions. Clear Generated Data : Right-click the cell in the project tree and select Clear Generated Data Duplicate the Project Step 5: Adjust Memory Allocation Settings If the


: Sometimes the current file is corrupt; duplicating the project and working on the copy can resolve the issue. Comprehensive Troubleshooting Guide 1. Reset User Profile Settings


Corrupted user configuration files are the most common cause of this crash. Ansys Innovation Space Rename AppData folder : Open Windows Explorer, type in the address bar, find the folder, and rename it to Rename Temp folder in the address bar, find the folder, and rename it to .ansys.old Restart Workbench


: ANSYS will reconstruct clean default folders upon relaunch. Ansys Innovation Space 2. Update and Configure Graphics Drivers In Workbench, go to  Tools &gt; Solve Process Settings


Outdated or incompatible drivers can crash the 3D graphics interface. Ansys Innovation Space