The DLL that is not registered is "C:\Program Files\National Instruments\Shared\Session Manager\NISessionServer.dll".
To manually reregister the DLL, you can run "regsvr32.exe
", where you specify the file above.
You should also be able to use the TestStand Version Selector application located at "C:\Program Files\National Instruments\Shared\TestStand Version Selector\TSVerSelect.exe" and select MakeActive button. One of the steps it does in reregister this DLL.
Scott Richardson
https://testeract.com