Unreal Engine Issues

Editor cannot handle blueprint structure using an Actor Map variable

If a blueprint structure contains a map variable with Actor Class Reference as the key, populating the map with a custom blueprint (ActorSet) and adding a variable of the structure to any other blue ...

Crash trying to rename a checked out umap

Editor crashes when a person renames a umap asset in the Content Browser that is checked out by another person. This doesn't occur if the user has the asset checked out themselves. ...

Crane doesn't work in a packaged game

Undoing the pasting of a copied node from the Blueprint Diff tools causes an access violation crash

The editor crashes with an Access Violation if a node that was copied and pasted from the Blueprint Diff tools is removed via an undo. Regression?: No This issue also occurred in 4.16 Branches tes ...

Foliage meshes do not appear in high res screenshots after certain amount

When using the Engine's High Res Screenshot tool, there is a limit on the amount of foliage that can be present before the meshes stop appearing. This number is around 1500 meshes, though I was not ...

Level Sequences with EnableCinematicMode set will enable cinematic mode when the sequence actor is spawned, not when the sequence is played.

We've added the option to automatically enable cinematic mode from a level sequence, but the change is made in the sequence actor's BeginPlay. This won't cause problems if the sequence is spawned an ...

[CrashReport] UE4Editor_PropertyEditor!FDetailCategoryImpl::GetParentLayout() [detailcategorybuilderimpl.h:166]

This is an intermittent crash occurring in the 4.17 release. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to [Link Removed], fixed i ...

[CrashReport] UE4Editor_CoreUObject!FLinkerSave::FLinkerSave() [linkersave.cpp:31]

This is a longstanding and common crash that has occurred since at least the 4.11 release. The error appears to occur while trying to access a .tmp file. User DescriptionsI left unreal unattended ...

[CrashReport] Assertion failed: OLEReferenceCount == 0 in UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private()

This is a regular and longstanding crash in 4.17 that has occurred since at least 4.14. Users have not provided any descriptions of their actions when the crash occurred. There has been some previo ...

Editor crash when calling SGridPanel::SetRowFill

Calling SGridPanel::SetRowFill on an actor's BeginPlay causes the editor to crash with the callstack provided The reporter mentioned SetRowFill uses if() statement where SetColumnFill uses while() ...