Unreal Engine Issues

Duplicating Level With Large _BuiltData File Results in Editor Crash

Trying to duplicate a level in the editor that has a large _BuiltData file results in a crash. In the case of the supplied test level, it is over 3 GB. Crash repros in 4.19.2 and Main (CL 4115885). ...

When change sequence struct parameter, the editor crash.

when change sequence struct param, the editor is carash. It occurs in the case of using "Sound Wave", but the same problem occurs when "Sound Cue" is used. Attach application log, and crash dump fil ...

Crash when force deleting blueprints that reference each other

Editor crashes when trying to force delete assets that reference each other. Blueprint 'A' contains an Actor Component of Blueprint 'B'. Crash will occur when trying to force delete both 'A' and 'B' ...

Setting struct variable to CurveTableRowHandle crashes editor

Editor immediately crashes if a variable is set to type Curve Table Row Handle within a structure. Frequency: 2/2 Crashreporter: N/A ...

Crash when adding a Material Layer with a MaterialFunctionCall node to a Material Instance

Adding a Material Layer to a Material Instance that has a Material Function Call node connected to the Set Material Attributes node causes the editor to crash. I tested a Material Layer without the ...

Crash when committing level instances containing invalid child actor components

Editor Crashes When Reopened Project's Level that Contains Vertex Painted Asset is Opened

Editor crashes when asset is imported in as a skeletal mesh, brought into a level, vertex painted using the paint tab under modes, all assets are saved, project is reopened, then level is reopened. ...

Crash opening Child/Grandchild Blueprint after updating to 4.18

From this UDN: https://answers.unrealengine.com/questions/718928/4180-editor-crash-while-opening-child-blueprint.html Crash occurs when opening child (or in the repro case, grandchild) blueprints a ...

Editor Crash when custom Enum is used as Set or Map container type

Making a blueprint variable a container (a Set or a Map with the Variable's "Pin Type" set to a custom Enum) and restarting the editor causes the editor to crash when opening the blueprint. Note: O ...

Crash when splitting a UDS pin on a collapsed graph

I came across this bug while attempting to verify UE-41073. That bug is verified, but I accidentally added the struct into the collapsed node without going into the collapsed graph and split the col ...