So I've been working on exporting a Dalek model from ProjectDalek to Source. The model is divided into segments, so I had to assign the bone parents and weights individually. This also means I have to export each body part seperately. For whatever reason, two of the model's segments just flat out refuse to export into SMDs, and I'm greeted with this error message for both of them:

Originally posted by Arson Hole:

Python: Traceback (most recent call last):
File "C:\Users\Arson\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\export_smd.py", line 213, in execute
self.exportId(context, exportable.get_id())
File "C:\Users\Arson\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\export_smd.py", line 365, in exportId
bake = self.bakeObj(id)
File "C:\Users\Arson\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\export_smd.py", line 930, in bakeObj
ops.uv.smart_project()
File "C:\Program Files (x86)\Steam\steamapps\common\Blender\2.91\scripts\modules\bpy\ops.py", line 132, in __call__
ret = _op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.uv.smart_project.poll() failed, context is incorrect

location: <unknown location>:-1

I'm not doing anything differently with these two segments that I've done with every other segment I've managed to export. Is there something I'm doing wrong, or is it an issue with the model itself?