UE4 Scene Crashing upon opening

Core - Sep 15, 2020

The user first launched his project and received an error on his HDD and UE4 crash with the default scene. He was able to open the project successfully a second time and opened the "Library Scene" ( ...

Templated enum GetValueAsString function returns incorrectly formatted string

Core - Aug 19, 2020

For many years there has been a static function on UEnum called GetValueAsString which would convert an enum like EAttachmentRule::KeepWorld to the string "KeepWorld", if you passed in the explicit ...

Cruncher Sharp Double click navigation doesnt work

Core - Aug 12, 2020

[Image Removed] [Image Removed] I suspect this came in at 13550642 where I created a more separated data/view model ...

IoStore: Can not update localization asset when change culture.

Core - Aug 12, 2020

It can't be updated localization assets when enabled IOStore. When disabled IOStore, it'll be able to update localization assets. ...

Crash launch application adding .umap url

Core - Aug 6, 2020

The application crashes when adding ".umap" to the launch map at application launch. If not specify ".umap", it will be able to launch application. There appears to be a failure to parse the URL. Th ...

Changing blueprint default values inside arrays only updates loaded child blueprints

Core - Jul 30, 2020

The rules for delta serialization in UE4 are complicated, and the editor tries to hide them from you, which works 90% of the time but can lead to confusion and data loss in other situations. In the ...

Duplicating BP actors reset edited Variables to Default Value if Variables name start with Chinese Character

Core - Jul 29, 2020

Hints: It has no problem in 4.24, only happening in 4.25 It has no problem as long as the Variable name is contained with Alphabat(English characters) fully; or start with Alphabat(A_变量 is fine) ...

Core Class Redirect doesn't work when converting from a C++ class to a BP

Core - Jul 16, 2020

The Export map will properly be updated but the creation of the import will fail with SourceIndex == INDEX_NONE From MarcA:  I'm guessing the import source index is always none for native classe ...

Array property of a User Defined Struct is corrupted when additional properties are added to the struct

Core - Jul 1, 2020

Modifying a UserDefinedStruct can lead to data corruption in Blueprint array properties. ...

Asset Registry GetDerivedClassNames does not work properly during editor startup

Core - Jun 25, 2020

This bug comes from https://udn.unrealengine.com/questions/585499/view.html which describes a problem where a licensee is trying to use the AssetManager to scan a primary asset type that is generate ...