NI-MAX Missing mfc140u.Dll and Won't Open

Updated Sep 18, 2018

Reported In


  • Measurement & Automation Explorer (MAX)

Issue Details

When I try to open Measurement & Automation Explorer (MAX), it won't open and I get an error saying "the code execution can not proceed because mfc140u.dll was not found" in a message similar to this: 


This error arises when their the mfc140u.dll isn't properly installed by NI-MAX or has become corrupted.  Since NI-MAX uses this C++ .dll in it's code base, your computer will need to have this file reinstalled to use NI-MAX.

This issue is can be resolved by reinstalling NI-MAX or by installing the underlying Microsoft Visual C++ 2015 Redistributable​ that packages this .dll. 

If you are running NI MAX on a 64 bit Windows machine, make sure you install both the x64 and the x86 DLL files.


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