TypeInitializationException Crash With FlexLogger, LabVIEW NXG or DAQExpress on Windows 7

Updated Apr 1, 2019

Reported In


  • FlexLogger 2018 R2
  • DAQExpress

Operating System

  • Windows

Issue Details

I am using FlexLogger, LabVIEW NXG or DAQExpress on Windows 7. I experience consistent crash behavior when I perform certain tasks like selecting back and forth between document tabs, adding a new indicator, or selecting the setting Preferences from the File menu. I encounter error TypeInitializationException, or in some cases I see FileFormatException error. 




This is an issue with the Microsoft .NET Framework January 2018 Security and Quality Rollup that affects Windows 7 computers.

To solve the problem, you should update the version of the Microsoft Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows 7 SP1 and Server 2008 R2 SP1 by following the steps in How to obtain and install the update section.

Additional Information

If you are unable to find the update in Windows Updates, you can also download it from Microsoft Update Catalog.