World Partition, crash

Hello!

Im currently trying to convert a world composition map made in 4.23 ( i know, unlikely and unsupported under 4.26, but i wanted to give it a try)

Anyway, the script starts out well, but ends in a crash.

Ive tried this on migrated maps from 4.23 to 5.0.0. but it crashes on map load with the error:

Assertion failed: MeshDescription.Vertices().GetArraySize() == NumVertices [File:D:/build/++UE5/Sync/Engine/Source/Runtime/StaticMeshDescription/Private/StaticMeshOperations.cpp] [Line: 1372]

0x00007ffc0b9d7fc8 UnrealEditor-StaticMeshDescription.dll!UnknownFunction
0x00007ffba040064d UnrealEditor-MeshBuilder.dll!UnknownFunction
0x00007ffba03f5b2c UnrealEditor-MeshBuilder.dll!UnknownFunction
0x00007ffba03f8f81 UnrealEditor-MeshBuilder.dll!UnknownFunction
0x00007ffbb81ac5ed UnrealEditor-Engine.dll!UnknownFunction
0x00007ffbb81ad6f6 UnrealEditor-Engine.dll!UnknownFunction
0x00007ffbb81ba130 UnrealEditor-Engine.dll!UnknownFunction
0x00007ffbb81b6cb1 UnrealEditor-Engine.dll!UnknownFunction
0x00007ffbb81b698e UnrealEditor-Engine.dll!UnknownFunction
0x00007ffbba879de2 UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba879de2 UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba879de2 UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba865fa7 UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba875612 UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba56ac0c UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba54de2d UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba594eba UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba55c88a UnrealEditor-Core.dll!UnknownFunction
0x00007ffbba69603c UnrealEditor-Core.dll!UnknownFunction
0x00007ffbbabb394b UnrealEditor-Core.dll!UnknownFunction
0x00007ffbbabac640 UnrealEditor-Core.dll!UnknownFunction
0x00007ffc3e5e7034 KERNEL32.DLL!UnknownFunction
0x00007ffc3ee82651 ntdll.dll!UnknownFunction

Crash in runnable thread Background Worker #7

Is there any chance here to get all this working? or am i screwed because its in 4.23?

Thanks :smiley: