PCGs Duplicate Point node option to apply in Relative Space has metadata warnings and crashes editor.

Development Pipeline & Plugins
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1

Using the PCG Duplicate Point node’s “Direction Applied in Relative Space” option deletes or messes with the output metadata and, if connected to an output or using its debug mode, will crash the editor.

It doesnt appear to matter what kind of points and data is coming in, how many iterations you add, or any other settings. The results are always a crash.

The repro steps:

  • Create or open a PCG graph.
  • Get any actor type and add a sampler of any type (spline, surface, etc)
  • Add the Duplicate Point node and increase its Iteration count.
  • Now check the Direction Applied in Relative Space box and observe the warning it produces about missing metadata.
  • Then enable the nodes debug preview mode or connect it to other outputs and watch your editor crash.

dup.jpg(57.4 KB)
dup2.jpg(59.7 KB)

2

Steps to Reproduce

  • Create or open a PCG graph.
  • Get any actor type and add a sampler of any type (spline, surface, etc)
  • Add the Duplicate Point node and increase its Iteration count.
  • Now check the Direction Applied in Relative Space box and observe the warning it produces about missing metadata.
  • Then enable the nodes debug preview mode or connect it to other outputs and watch your editor crash.
3

I think this is the crash from the log too:

[2026.01.20-21.29.03:927][530]LogWindows: Error: appError called: Assertion failed: IsRotationNormalized() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Math\TransformVectorized.h] [Line: 1307]

[2026.01.20-21.29.03:927][530]LogWindows: Windows GetLastError: The operation completed successfully. (0)

[2026.01.20-21.29.05:324][530]LogWindows: Error: === Critical error: ===

[2026.01.20-21.29.05:324][530]LogWindows: Error:

[2026.01.20-21.29.05:324][530]LogWindows: Error: Assertion failed: IsRotationNormalized() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Math\TransformVectorized.h] [Line: 1307]

[2026.01.20-21.29.05:324][530]LogWindows: Error:

[2026.01.20-21.29.05:324][530]LogWindows: Error:

[2026.01.20-21.29.05:324][530]LogWindows: Error:

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff72ca7f58 UnrealEditor-Core.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff72c8df74 UnrealEditor-Core.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff72c5d4d5 UnrealEditor-Core.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff72c5c8de UnrealEditor-Core.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff64783fbd UnrealEditor-Engine.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff64783aa0 UnrealEditor-Engine.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff235fc386 UnrealEditor-PCGEditor.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff235fada9 UnrealEditor-PCGEditor.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff24664583 UnrealEditor-PCG.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff243b6377 UnrealEditor-PCG.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff24392ba2 UnrealEditor-PCG.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff2439f949 UnrealEditor-PCG.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fff72a8176b UnrealEditor-Core.dll!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b46037 UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b60bfe UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b60d0a UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b64590 UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b75bd4 UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007ff689b78f8a UnrealEditor.exe!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error: [Callstack] 0x00007fffa6407374 KERNEL32.DLL!UnknownFunction []

[2026.01.20-21.29.05:324][530]LogWindows: Error:

[2026.01.20-21.29.05:332][530]LogExit: Executing StaticShutdownAfterError

[2026.01.20-21.29.05:339][530]LogWindows: FPlatformMisc::RequestExit(1, LaunchWindowsStartup.ExceptionHandler)

[2026.01.20-21.29.05:339][530]LogWindows: FPlatformMisc::RequestExitWithStatus(1, 3, LaunchWindowsStartup.ExceptionHandler)

[2026.01.20-21.29.05:339][530]LogCore: Engine exit requested (reason: Win RequestExit)

4

Hi Dustin,

Thank you for providing information and repo steps.

I have submitted a new bug report for this issue, and once it is reflected publicly, you will be able to view it here: UE-361647

An engine developer will investigate the bug at a later date. We don’t provide updates on EPS, but progress can be followed on that public issue tracker page. I will go ahead and close this case now, but feel free to respond here if you have any follow up questions.

Thanks,

Henry Liu