Unreal Engine Issues
Unreal Engine Issues
Crash reported when launching the binary Editor on a 2018 iMac Pro
UE - Platform - Apple - Oct 31, 2018There has been a report of a consistent crash of the binary Editor on launch when it is being launched on an iMac Pro. Additional information from two separate reports about this crash seem to indi ...
Crash from Tmap removing a key then printing the remaining keys
UE - Gameplay - Blueprint - Apr 7, 2017Crash from Tmap removing a key then printing the remaining keys. This has occurred in the third person template, but no further testing has been done for other templates. Regression: TMaps did not ...
Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Graphics Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
Casting to a child with a self reference can cause a crash
UE - Gameplay - Blueprint - Aug 13, 2015Casting to the child of a blueprint using the self reference (as the parent) throws a warning. Then placing a self reference anywhere in the event graph of the child by it's self will cause a crash ...
Crash in Hand IK Retargeting with two entries under "IKBones to Move"
UE - Anim - Rigging - Feb 28, 2017Crash in Hand IK Retargeting with two entries under "IKBones to Move" Only seems to happen when you have a hand bone in the second slot of "IKBones to move" ...
Editor crash when adding elements to blueprint Set/Map
UE - Gameplay - Blueprint - Mar 22, 2017Adding multiple element to TMap / TSet variable at once with a for loop causes the editor to lock up / crash (respectively). Regression: No - Map & Set variable types not available prior to 4.15 ...
10 or more Static Meshes set to Simulate Physics and Replicates Movement will crash the editor with PIE set to 2 or more players
UE - Networking - May 19, 201510 or more Static Meshes set to Simulate Physics and Replicates Movement will crash the editor with PIE set to 2 or more players. Less than 10 don't cause a crash. The user reporting this got a mor ...
Clicking the Add Variable button in a Struct that is referenced as two inputs in a function that is called in an Actor Blueprint's Construction Script causes a crash
UE - Gameplay - Blueprint - Jun 28, 2015Clicking the Add Variable button in a Struct that is referenced as two inputs in a function that is called in an Actor Blueprint's Construction Script causes a crash. This does not occur in the Even ...
Editor crash when Sequence component is added to code class
UE - Anim - Sequencer - Aug 31, 2017Adding a USequenceComponent to a code class will cause the editor to crash when the component is selected in blueprints Regression: No - same behavior occurs in 4.16.3 (CL 3561208) ...
r.SimpleDynamicLighting causes crash
UE - Graphics Features - Jul 2, 2015Setting the console command r.simpledynamiclighting to true in the editor causes massive rendering issues and if you attempt to open a New Material, the editor will crash. See attached Movie Also ...