TestStand Sequence Editor Fails to Launch

Updated Dec 7, 2017

Reported In


  • TestStand

Issue Details

I'm trying to launch TestStand Sequence Editor but when I do the following error occurs:

"Could not load file or assembly 'System.Configuration,
Version=, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.
The system cannot find a file specified."

I am able to run sequence files from a User Interface.


  1. Uninstall .NET Framework. Open Programs and Features from the Windows Control Panel (or Add or Remove Programs for Windows XP). Uninstall everything that starts with "Microsoft .NET," doing newest versions first.
  2. Reinstall .NET Framework from TestStand installer. This automatically comes up at the beginning of the installation process. For example:

Additional Information

This error happens due to missing/corrupt files in .NET Framework. The referenced dll, System.Configuration.dll, is part of it. Some or many files could be missing/corrupt so it's advisable to reinstall .NET Framework. To prevent incompatible versions of Framework it's easier to do install it from the TestStand installer.


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