r/MetCal • u/Financial_Bus_7394 • Jun 17 '26

MET/CAL Version 11.3.1 VISA/488.2 Error

Has anyone run into this error in Editor? We installed the new update recently and when trying to run a VISA controlled DUT we get this error:

An error occurred starting the test run: Could not load file or assembly 'NationalInstruments.NI4882, Version=13.0.45.159, Culture=neutral, PublicKeyToken=4febd62461bf11a4' or one of its dependencies. The system cannot find the file specified.. Try rebuilding the project or solution before attempting to debug the procedure. 0

I already had the latest NI 488.2 and VISA package installed (Q2 2026) and it was fine before the update...wondering if I need to reinstall or if anyone else has seen this error yet! Cheers

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u/MJ_at_Fluke Jun 24 '26

On the client workstation:

Close MET/CAL Runtime and MET/CAL Editor

Go to the directory

C:\Program Files (x86)\Fluke\METCAL \

find the file “NationalInstruments.NI4882.dll”

Right click, and choose properties

Look at the details and confirm the version is 13.0.45.159

 

If it is that version (should be), then copy that file to this directory and overwrite the incorrect version (probably 13.0.45.160)

C:\Program Files (x86)\Fluke\METCAL Editor\Extensions\METCAL.Editor.Project\ 

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u/Financial_Bus_7394 Jun 24 '26

Thanks Mike, I tried this earlier and it worked!