Arnold Plugin Missing in Maya or 3ds Max: Causes & Solutions

Issue:

Arnold plug-in is missing from Maya or 3ds Max, after restarting or installing the application.

Causes:

The installation of the Arnold plug-in has been corrupted, or the plugin is not loaded properly in 3ds Max and Maya.

Solution:

1. Close 3ds Max or Maya.
2. Download & install the Arnold plug-in from Solid Angle: Arnold Downloads.
3. Load the plug-in in 3ds Max or Maya:

Maya: Windows > Settings/Preferences > Plug-in Manager and verify that mtoa.mll is set to Loaded and Auto Load.

3ds Max: Customise > Plug-in Manager verify that Arnold MAX plug-ins is checked.

See also:

• Error: “Max.NET Unhandled Exception” for Ephere.Utilities.Evaluator when launching 3ds Max
• [Error]: Cannot rotate or scale in the UV Editor in Maya

Source: Autodesk