When using the CC Auto Setup plugin in 3ds Max 2023 and 2024 to create a rig for a Character Creator (CC) character with a Biped skeleton, the process fails and throws the following error in the MaxScript/Python output：
Traceback (most recent call last):
File “…/rig/bodyrig.py”, line 92, in create_body_rig
File “…/rig/biped.py”, line 39, in create_rig
IndexError: list index out of range
The error occurs during the Biped rig creation stage, where the plugin tries to access elements in a bone list but fails because the expected bone structure is missing or incomplete.