MaxPaint

Errors in Max 2015

The script causes this error in 3ds Max 2015. It is encrypted so we cannot fix it. :(

-- Error occurred in NewMap_btn.pressed();
filename: C:\Program Files\Autodesk\3ds Max 2015\scripts\MaxPaint\MaxPaint.mse; position: 35757; line: 982
-- Defined in encrypted script >> MAXScript Rollout Handler Exception:
-- Unknown property: "filename" in undefined <<

I am trying to paint masks for a custom Shader FX shader in a DirectX material. Viewport Canvas only shows the bitmap you are painting, not the shader result.