Python: Traceback (most recent call last): File "C:\Users\xxx\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\import_smd.py", line 72, in execute self.num_files_imported = self.readSMD(filepath, self.properties.upAxis, self.properties.rotMode) File "C:\Users\xxx\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\import_smd.py", line 1241, in readSMD if line == "triangles\n": self.readPolys() File "C:\Users\xxx\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\io_scene_valvesource\import_smd.py", line 721, in readPolys norm[i-1] = float(values[i+3]) IndexError: list index out of range location: <unknown location>:-1