MjSpec doesn't recompile when SKN files are used

[vikashplus]

Intro

Hi!

My setup

M3, Osx, Python, mujoco==3.2.4

What's happening? What did you expect?

Recompilation of mjSpec from a model that uses a skn file doesn't work.

Steps for reproduction

1. Run python test.py as is to see the bug
2. Alternatively one can remove the following line from the model to make the bug go away.
   <skin name="skin" file="meshes/cube.skn"/>

summary

• recompilation works well when there is no SKN file in the model, and doesn't work otherwise

spec_skn_recompile_bug.zip

Minimal model for reproduction

see attached

Code required for reproduction

python test.py

Confirmations

• I searched the latest documentation thoroughly before posting.
• I searched previous Issues and Discussions, I am certain this has not been raised before.