Issue:

When launching 3ds Max, a Max.NET error is received that states an exception with the Ephere Utilities Evaluator or a similar module has occurred.

Max.NET Unhandled Exception
Exception and stack trace:
System. Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
—> System.TyInitializationException: The type of initializer for ‘Ephere.Utilities.Evaluator’ threw and exception.
—> System.IO.IOException: The process cannot access the file ‘C:\ Users\…”

Max .net error
Max .net error

In addition, once working in 3ds Max multiple errors display when trying to use various tools or when right-clicking on the viewport. Errors may be similar, but not limited those seen below:

Error saving to temp directory 3ds Max
Error saving to temp directory 3ds Max
States sets error 3ds Max
States sets error 3ds Max

Causes:

Causes of this issue include, but are not limited to:

  • An installed anti-malware, anti-virus, or system optimizer program, such as ByteFence Anti-Malware, is flagging multiple 3ds Max plug-ins or components and denying access to them, leading to various errors and exceptions.
  • Corrupted Microsoft .NET or Visual C++ elements.

Solution:

To address this issue, try the following:

  1. Follow the instructions in your firewall or antivirus program’s Help file to whitelist or add exclusions to the 3ds Max installation folder located in: C:\Program Files\Autodesk\3ds Max.
  2. Repair the Microsoft .NET framework installation by downloading and running the hotfix located here.
  3. Uninstall and reinstall the Visual C++ components: How to remove and reinstall Microsoft Visual C++ Runtime Libraries

See also:

Source: https://autode.sk/3236ow5

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