LabVIEW exe Exception: Access Violation (0xC0000005)

Updated Dec 24, 2025

Reported In

Software

  • LabVIEW

Issue Details

My LabVIEW application periodically crashes and gives the error:
Exception-Access-Violation-0xC0000005


                                    

Solution

This is a generic Windows crash and has many possible causes. 

Troubleshooting steps:

  • This error is sometimes caused by a memory leak. Monitor system memory usage on the machine that is crashing.
  • Try disabling antivirus on the machine hitting this crash. There have been a few occurrences of antivirus software causing this crash.
  • There were a couple of instances of this occurring when trying to write data to a TDMS file from a channel that didn't exist. Verify what data is being written to the files before the crash and verify that it is coming from a viable source. Check references related to file I/O.
  • Issues with Datasocket usage can cause this error; check the crash logs to verify this.
  • If you are using multiple serial-to-USB converters. You can resolve the issue by replacing these with a PCI DAQ card.
  • This can be caused by corrupted type definitions within the project. To resolve this, you can disconnect the type definitions from the executable build specification: 
    Application properties > Additional Exclusions, and check the option "Disconnect type definitions".