Unreal Engine Issues

Crash when using automated groom import

UDN customer reported that using automated groom import through Blueprint was crashing. This can probably be reproduced with a Python script using an asset import task with the automated flag set to ...

Crash occurs when compiling in Editor after editing a C++ file

Crash seems inconsistent, doesn't seem to happen every time. You may have to change the variables and re-compile through the editor a few times to get it to trigger. The crash did occur for me when ...

Granular Synth crashes project when played in standalone or packaged with assertion failure

Assertion failed: SoundWave->GetPrecacheState() == ESoundWavePrecacheState::InProgress The above assertion fail was seen when played in standalone mode. Play-In-Editor mode (PIE) is working as exp ...

If use with mesh particles or use with niagara mesh particles is checked in the Usage flag of the material and the material domain is set to volume, compile error will occur.

[SM5] /Engine/Private/VolumetricCloud.usf(118,33-53): error X3018: invalid subscript 'VertexId' This is happening in VolumetricCloud.usf, but it seems that I can avoid the error by adding the follow ...

Duplicate level collections not being respected by UGameEngine::NetworkRemapPath

When NetworkRemapPath was refactored in 4.26 to support replay connections via the rep graph, the check for duplicate level id on the driver was lost in the new code path. This causes the demo driv ...

Nameclash error when importing skeletal mesh

The attached FBX file is getting a nameclash error when imported.  This content is licensee content please delete after using. This issue is NOT occurring at 4.25.4 Binary @ CL 14818863 Marked as ...

WaitMutex behaves poorly when there are casing differences in the same path

The proposed solution here is to make the casing of the path provided to the hashing function for the mutex consistent with something like:publicstatic string GetUniqueMutexForPath(string Name, stri ...

Text type parameters show the same value after reload in duplicated actor

Issue occurs in both events and functions. Seems like it's only affecting Text, didn't notice this issue for other variable types. The original actor is working as expected. Only the duplicated one ...

GetBoundObjects is not returning spawned objects when the playback start is nonzero

NPC - Initializing a System parameter to a Niagara Parameter Collection data interface parameter does not work

Initializing a System parameter to a Niagara Parameter Collection data interface parameter does not work ...