Unreal Engine Issues

Editor Utility Widgets: Asset creating nodes' output pins in uber graphs cause asset deletion warning

Editor Utility Widgets (EUW) can be used to script editor behavior. One use case is the automation of asset creation. A licensee has reported that when an EUW is used to create an asset, for as lon ...

Parameter distributions can be reset to None in Cascade Particle Systems, causing Cascade to Niagara conversion to crash the editor.

Cascade to Niagara conversion causes the editor to crash due to any distribution parameter in the Particle Emitter being reset to none. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL# 1831 ...

OnlineServices-Lobbies: Crash when host migration message is received and the next host has already left the session

A crash occurs at FindChecked in the code below.if (PreparedServiceChanges->OwnerAccountId) { InternalPublicData->OwnerAccountId = *PreparedServiceChanges->OwnerAccountId; if (bDispatchNot ...

Crash when mousing over array parameter in Blueprint function graph while debugging

Mousing over an array input inside a Blueprint function can lead to a crash. For this to occur, the first parameter of the function must be a User Defined Struct.  ...

Assertion thrown when connecting a World Position node to the time input of a Panner node then connecting it to Base Color

Assertion thrown when connecting a World Position node to the time input of a Panner node then connecting it to Base Color. This is a regression. ...

Crash importing SOLIDWORKS model

Importing through Python fails

Version 4.21:The script result in popping the Alembic Import windows instead of a silent importThe provided options are ignored by the importer.  Version 4.22: Results in the provided callstack wi ...

Crash on Linux and Windows with Vulkan when adding Atmospheric Fog to a Level

Adding an instance of Atmospheric Fog to a Level causes the Editor to crash on both Linux and Windows when using Vulkan. There is a different callstack when SteamVR is enabled on Linux which is also ...

Camera modifier blueprint used in another blueprint crashes editor (Assert failed in edit condition code in details panel)

Changing the default values inside of a camera modifier blueprint when referencing it in another blueprint results in a crash. Tested in 4.21, 4.22, 4.23 and 4.24 ...

Assertion failed: Engine crushes when a geometry collection hits a landscape

This is because THeightField::PhiWithNormal has not been implemented yet. ...