"Graph is linked to object World" - World Partition (Converting World Comp. Problem)

Development World Creation
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1

Hello Unreal Community, I try to convert my larger UE4 Project to the Unreal Engine 5 with great success, but when it comes to the “World Composition to World Partition” Process, I get a ton of problems.

I get the error message that a sublevel of my “world composition” map is linked to the … persistent level of the “world composition” map. Well I think yea that is ok, but World Partition can’t convert it?

Can anyone give me a hint? This Convert Tool is very frustrating

(...)
[2023.03.12-00.25.46:626][  0]LogWorldPartitionConvertCommandlet: Warning: Renamed object from /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x7_y4.heightmap_x7_y4:PersistentLevel.Brush to /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel.Model_62
[2023.03.12-00.25.46:628][  0]LogWorldPartitionConvertCommandlet: Warning: Renamed object from /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x7_y5.heightmap_x7_y5:PersistentLevel.Brush to /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel.Model_63
[2023.03.12-00.25.46:629][  0]LogWorldPartitionConvertCommandlet: Warning: Renamed object from /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x7_y6.heightmap_x7_y6:PersistentLevel.Brush to /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel.Model_64
[2023.03.12-00.25.46:630][  0]LogWorldPartitionConvertCommandlet: Warning: Renamed object from /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x7_y7.heightmap_x7_y7:PersistentLevel.Brush to /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel.Model_65
[2023.03.12-00.25.48:598][  0]LogSavePackage: Warning: 

Referencers of Model /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel.Model_37:
[2023.03.12-00.25.51:776][  0]LogSavePackage: Warning: 	Brush /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1 (1 refs)
[2023.03.12-00.25.51:777][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.Brush:Brush
[2023.03.12-00.25.51:779][  0]LogSavePackage: Warning: 	BrushComponent /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1.BrushComponent0 (1 refs)
[2023.03.12-00.25.51:780][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.BrushComponent:Brush
[2023.03.12-00.25.51:781][  0]LogSavePackage: Warning: 

Referencers of Level /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:PersistentLevel:
[2023.03.12-00.26.17:244][  0]LogSavePackage: Warning: 	Brush /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1 (1 refs)
[2023.03.12-00.26.17:246][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.Brush:Brush
[2023.03.12-00.26.17:246][  0]LogSavePackage: Warning: 	BrushComponent /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1.BrushComponent0 (1 refs)
[2023.03.12-00.26.17:247][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.BrushComponent:Brush
[2023.03.12-00.26.17:248][  0]LogSavePackage: Warning: 

Referencers of World /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc:
[2023.03.12-00.27.06:850][  0]LogSavePackage: Warning: 	Brush /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1 (1 refs)
[2023.03.12-00.27.06:852][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.Brush:Brush
[2023.03.12-00.27.06:852][  0]LogSavePackage: Warning: 	BrushComponent /Game/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.heightmap_x4_y3:PersistentLevel.Brush_1.BrushComponent0 (1 refs)
[2023.03.12-00.27.06:853][  0]LogSavePackage: Warning: 		0) ObjectProperty /Script/Engine.BrushComponent:Brush
[2023.03.12-00.27.06:859][  0]LogWindows: Error: appError called: Can't save D:/Unreal Projects/XXXXXXXX/Content/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.umap: Graph is linked to object World /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc (Brush) in external map
[2023.03.12-00.28.07:084][  0]LogWindows: Error: === Critical error: ===
[2023.03.12-00.28.07:084][  0]LogWindows: Error: 
[2023.03.12-00.28.07:084][  0]LogWindows: Error: Can't save D:/Unreal Projects/XXXXXXXX/Content/SGT/Maps/Multiplayer/OpenWorld/heightmap/heightmap_x4_y3.umap: Graph is linked to object World /Game/SGT/Maps/Multiplayer/OpenWorld/OpenWorld_wc.OpenWorld_wc (Brush) in external map
[2023.03.12-00.28.07:085][  0]LogWindows: Error: 
[2023.03.12-00.28.07:086][  0]LogWindows: Error:

wperror
wperror1920×1080 424 KB

(In the engine itself Tools>Convert Level is not working - there are no errors but the WP Conversion does nothing)

2

So … well … in the end it was a dumb question:

  • Just delete the Actor in your world “Brush”. In my case it was brush, maybe your error message is something like “(…) MyMap (Cube) in external map”.
    – In this case, “Cube” would be your problem

Where is the “Brush” Error coming from?
It seems like when you convert your Level from World Composition to World Partition, some objects get replaced by Brushes. I don’t know why but simply delete the asset which is displayed in the error message, load a backup, delete all generated world partition files after the crash and restart the process :slight_smile:

After 4 days, i got my large map now converted :smiley: