Unreal Engine Issues
Unreal Engine Issues
It is not possible to export virtual layer masks (AI or from mesh) through the COLMAP exporter.
RS - MVS - Jan 8, 2026Found in 2.1.0.119011 (R210). The mask export doesn't work even when the masks are regenerated from the mesh. Outcome: Error appears: "The filename, directory, or volume label syntax is incorrect ...
Ensure when restoring pre-animated state on Skeletal Mesh with Linked Anim Graph
UE - Anim - Sequencer - Jul 20, 2020Download and launch attached projectPIEPress the "E" key to play the sequenceWait until sequence finishes RESULT Ensure in FAnimInstanceProxy::GetSkeleton as a result of restore state calling Unbind ...
Crash attempting to change Variable Type from My Blueprint panel
UE - Gameplay - Blueprint Editor - Apr 21, 2017Crash occurs when the user attempts to change the variable type by clicking on its icon in the My Blueprint panel. No crash occurs when trying this in the Details panel. This does not reproduce in ...
Assertion Failure: Cascade Particle !bPostTickComponentUpdate in same tick group as Cascade Particle system submission.
UE - Niagara - Apr 18, 2019Attached Project: [Link Removed] Since Upgrading project to 4.22, Licensee has been experiencing an Assertion crash in their built game. "I'm not exactly sure why it crashes. It's a very specific ...
[CrashReport] UE4Editor_PropertyEditor!FObjectPropertyNode::GetValueBaseAddress() | FSequencerObjectChangeListener::OnObjectPostEditChange
UE - Anim - Sequencer - Oct 5, 2017This is a common crash that has occurred in 4.17.1 and 4.17.2, there are no immediate records of it occurring previously. Users have not provided any descriptions of their actions when the crash oc ...
Crash when creating a key in a blackboard with a name longer than 1024 characters
UE - AI - Mar 21, 2017Black board key names that are longer than 1024 characters will cause a crash ...
Calling functions that have an implicit WorldContextObject parameter in a Blueprint function library will give a compile error about a missing __WorldContext pin
UE - Gameplay - Blueprint - May 21, 2015Calling functions that have an implicit WorldContextObject parameter (line trace, execute console command, etc) in a Blueprint function library will give a compile error about a missing __WorldConte ...
Variables can no longer be set as a DataTableRowHandle type
UE - Gameplay - Blueprint - Sep 14, 2015Variables can no longer be set as a DataTableRowHandle type. The option is no longer available in the Variable Type dropdown. This is a regression: this was possible in 4.7.6. Reproduced in 4.8.3 b ...
Can't PIE or Save: Editor gets into odd state when editing parameters.
Tools - Jul 20, 2016I've seen this happen in other areas of the editor as well: Data Table fields (floats) for example. Manually typing in numbers to fields seems less prone to this error; using spinners to drag value ...
Crash attempting to drive a Pawn with no torque
UE - Simulation - Physics - Oct 24, 2016Crash occurs when the user attempts to drive a non-Vehicle pawn (using a Vehicle Wheel Movement component) with the Torque Curve flattened to 0. I was not able to reproduce this crash when I tried ...