[BUG] key error when importing scene

[knittinkittin]

hey, so this is sort of already solved, but just mentioning it in case anyone's having the same problem.

when i went to import MODELS\SPACESTATION\SPACESTATION.SCENE.MXML, i would get this error:

Python: Traceback (most recent call last):
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\NMSDK.py", line 933, in execute
importer.render_scene()
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\ModelImporter\import_scene.py", line 345, in render_scene
added_obj = self._add_empty_to_scene(self.scene_node_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\ModelImporter\import_scene.py", line 612, in _add_empty_to_scene
self.descriptor_data = read_descriptor(descriptor_path + '.MXML')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\ModelImporter\readers.py", line 230, in read_descriptor
data = read_TkModelDescriptorList(data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\ModelImporter\readers.py", line 206, in read_TkModelDescriptorList
'Children': [read_TkModelDescriptorList(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\xxxxxxx\AppData\Roaming\Blender Foundation\Blender\4.2\scripts\addons\nmsdk\ModelImporter\readers.py", line 207, in
x['List']) for x in desc['Children']]}
~^^^^^^^^
KeyError: 'List'

but some other models, like MODELS\SPACESTATION\MODULARPARTS\DOCK\ENTRANCESECTION.SCENE.MXML i could import fine, and the only difference between them i could notice, as someone who can only barely follow code, was that the entrancesection model didn't have a descriptors file.

anyway, being lazy and a bad coder, i threw it into deepseek and it gave me this change to the read_TkModelDescriptorList() function in ModelImporter/readers.py:

def read_TkModelDescriptorList(data: dict) -> dict:
    ret_data = dict()
    for d in data:
        desc_data = []
        for desc in d.get('Descriptors', []):
            # Safely handle 'Children' entries
            children = []
            for child in desc.get('Children', []):
                # Check if 'List' exists in the child structure
                if 'List' in child:
                    children.append(read_TkModelDescriptorList(child['List']))
            sub_desc_data = {
                'Id': desc.get('Id'),
                'Name': desc.get('Name'),
                'ReferencePaths': desc.get('ReferencePaths', []),
                'Children': children  # Use the filtered list
            }
            desc_data.append(sub_desc_data)
        ret_data[d['TypeId']] = desc_data
    return ret_data

hope someone finds this helpful in some way!