Missing Texture images with long file path (over 256 chars)

Rhino Rhino for Windows
1

I can confirm that the files exist.
However Rhino reports missing embedded files with path that are longer than 256 characters.
Sometimes 200 chars? May need more thorough testing to determine the exact threshold.

To replicate:

  • Create Rhino file, Add a Picture Frame.
  • Save file on a location with short path. (make sure to tick Save textures etc.)
  • Copy this file to a nested folder with path more than 256 characters.
  • Open the file.
  • Rhino warns of missing files, even if it successfully extracted the embedded files.

We add many Picture Frames in the model programmatically via code, and would like to know if there is any fixes, or workaround for this.

Thanks !

Version 8 SR17
(8.17.25066.7001, 2025-03-07)

2

Attaching a sample document for testing purpose.
texture-image-path-test.3dm (97.5 KB)

The same file added in nested folder.
test_nested_folder.zip (60.2 KB)
Extract to C:\tmp and open the included Rhino document. Rhino will report missing embedded files.