Originally posted by Artfunkel:

Looks like corrupt geometry to me. Your shape has fewer vertices than the mesh.

well, I did some more messing around and I found out that triangulating the mesh made it export correctly. thanks for the help :D

(edited) well I did some more looking into it and at first I thought it was because of loose geometry that was making it fail, but it's the first shape key after basis (any shape key) that's making it crap out. if I have the shape key enabled and I export, it exports just fine (but the model will always look like it's screaming which is not ideal...) so now im wondering what to do to fix it. for now I will just leave the model without shape keys until a fix can be found. im willing to give out anything that can help my case..

hey, uh. im sorry for the bump but I have the same issue occurring, and im on the latest version.

- D:\Resources\Stuff I Made\Garry's Mod Stuff\Playermodels\RUBI\Sourcefiles\compile\RubiMeshPC.vta
Traceback (most recent call last):
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 219, in execute
self.exportId(context, id)
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 568, in exportId
self.files_exported += write_func(id, bake_results, self.sanitiseFilename(export_name), path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 1239, in writeSMD
written += self.writeSMD(id,bake_results,name,filepath,filetype='vta')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 1219, in writeSMD
shape_loop = shape.loops[mesh_loop.index]
~~~~~~~~~~~^^^^^^^^^^^^^^^^^
IndexError: bpy_prop_collection[index]: index 53064 out of range, size 53064
Error: Python: Traceback (most recent call last):
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 219, in execute
self.exportId(context, id)
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 568, in exportId
self.files_exported += write_func(id, bake_results, self.sanitiseFilename(export_name), path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 1239, in writeSMD
written += self.writeSMD(id,bake_results,name,filepath,filetype='vta')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\squid\AppData\Roaming\Blender Foundation\Blender\4.4\scripts\addons\io_scene_valvesource\export_smd.py", line 1219, in writeSMD
shape_loop = shape.loops[mesh_loop.index]
~~~~~~~~~~~^^^^^^^^^^^^^^^^^
IndexError: bpy_prop_collection[index]: index 53064 out of range, size 53064

i dont have any modifiers on my model and im..uh not sure what could be causing it.

the model is a paid vrchat avatar (which has turned free) so im able to give you the blend file if you need to look into it.