Python: Merge Static Mesh Actors Error

Hi,
I’m trying to merge some actors in the editor level. But I get the following error and cannot find my mistake:

LogPython: Error: ue.log_error(StaticMeshEditorSubsystem.merge_static_mesh_actors(cur_actors, mergeOptions))
LogPython: Error: TypeError: StaticMeshEditorSubsystem: Failed to convert parameter ‘merge_options’ when calling function ‘StaticMeshEditorSubsystem.MergeStaticMeshActors’ on ‘StaticMeshEditorSubsystem_0’
LogPython: Error: TypeError: NativizeProperty: Cannot nativize ‘MergeStaticMeshActorsOptions’ as ‘MergeOptions’ (StructProperty)
LogPython: Error: TypeError: NativizeStructInstance: Cannot nativize ‘MergeStaticMeshActorsOptions’ as ‘MergeStaticMeshActorsOptions’

And here is my code:

mergeOptions = ue.MergeStaticMeshActorsOptions
StaticMeshEditorSubsystem = ue.get_editor_subsystem(ue.StaticMeshEditorSubsystem)
StaticMeshEditorSubsystem.merge_static_mesh_actors(actors_to_merge, mergeOptions)

Thanks for your help

Christian