Multi Exporter doesn't work in 3ds max 2021

SDK Version: 1.1.2

Frequency: Consistently

Severity: Blocker

Bug description:
After clicking on “Export selected” or “Export checked” nothing happens and Max Listener shows the following:

Traceback (most recent call last):
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\multiExporter.py”, line 204, in
self.btnExportTicked.pressed.connect(lambda : self._clickedExport(exportOption=const.EXPORT_OPTION.CHECKED))
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\multiExporter.py”, line 1158, in _clickedExport
self.export(exportOption)
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\multiExporter.py”, line 1304, in export
exportedGltfs = self.exportLODs(exportOption)
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\multiExporter.py”, line 1211, in exportLODs
sceneRootNodesForGltfExport, errorLog, bypassErrorLog = self.treeLODs.getExportSceneRootNodesList(exportOption, exportXML=self._exportXml, visibleInListOnly=visibleInListOnly)
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\view\treeViewLods.py”, line 1092, in getExportSceneRootNodesList
exportModelSubItems = self.getItemChildren(exportModelItem)
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\view\treeViewLods.py”, line 678, in getItemChildren
return self.getSubTreeItems(topItem, nbRecurse = 0)
File “C:\MSFS 2024 SDK\Tools\3dsMax\MSFS2024Package\scripts\msfs_max_py_2024\MultiExporter2024\view\treeViewLods.py”, line 684, in getSubTreeItems
if topItem == None:
NotImplementedError: operator not implemented.

Thanks.

Hello,

Can you send us your .max scene please ?

See 3) here

Thank you,

Regards,
Yasmine

It turned out that the described bug only occurs with the “Scene hierarchy based export” option. With the “User defined layer based export” everything works.

The issue is resolved for me.

Thanks.

Hello,

The “Scene Hierarchy Based Export” error might be caused by an issue with the plugin or the way your scene is set up.

What version of 3ds Max are you using? I guess it’s in the topic title, 2021 ?
Did you try to export using the da62 max samples ?

Regards,
Boris

Hello,

What version of 3ds Max are you using? I guess it’s in the topic title, 2021 ?

Yes, 2021.

Did you try to export using the da62 max samples ?

Yes, this was the first thing to try. But none of the max files from the SDK samples open in the 3ds max 2021.
3dsmax_error