4.12.1 Hotfix Released

The 4.12.1 Hotfix is now live! This includes fixes to over 20 issues, including many important stability fixes for crashes.

Feel free to discuss this release on the 4.12 Forum thread.

If you experience a bug with the 4.12.1 Hotfix, please remember to log a bug report for the issue on the UE4 AnswerHub to the Bug Reports section.

Fixed in 4.12.1

Fixed! UE-31570 Crash in StaticDuplicateObject while compiling or editing variables in blueprint widgets
Fixed! UE-31550 Using Integer Bitmask crashes editor
Fixed! UE-23371 [CrashReport]UE4Editor_GraphEditor!FNodeFactory::CreateNodeWidget() nodefactory.cpp:91
Fixed! UE-26761 Crash When Compiling Child Blueprint Containing a Custom Event with the Same Name as its Parent’s Event
Fixed! UE-31443 Crash occurs clicking “Select All” in Foliage Tool in QA-Sequencer map
Fixed! UE-31183 [CrashReport] UE4Editor_Engine!FAnimNode_StateMachine::Evaluate() [animnode_statemachine.cpp:745]
Fixed! UE-31574 RemoveNaNTracks causes anim DDC data to be regenerated every load on old animations
Fixed! UE-31445 [CrashReport] UE4Editor_DetailCustomizations!FBodyInstanceCustomization::GetDefaultCollisionProvider() [bodyinstancecustomization.cpp:35]
Fixed! UE-31255 Shipping Builds packaged for WinXP 32 bit crash when opening on Win7
Fixed! UE-31492 Can no longer generate a dsym on Mac
Fixed! UE-25561 Read IAP information node causes hang if connection is disconnected
Fixed! UE-31539 GPU crash on PS4 due to GS mode not getting disabled when using parallel contexts
Fixed! UE-31247 Emissive for Static Lighting discarded upon Re-opening Level or Restarting Project
Fixed! UE-28817 [CrashReport] UE4Editor_Engine!FStaticLODModel::Serialize() [skeletalmesh.cpp:1261]
Fixed! UE-15903 [CrashReport] Lighting build triggers array out of bounds crash
Fixed! UE-31620 Roughness Calculation is incorrect in 4.12
Fixed! UE-26288 Crash on unchecking Generate Lightmap UVs and Applying with Mesh already assigned and painted as Foliage
Fixed! UE-31182 [CrashReport] UE4Editor_Engine!FMaterial::GetShader() [materialshared.cpp:1564]
Fixed! UE-18906 [CrashReport] Crash in !UE4Editor_D3D11RHI!FD3D11DynamicRHI::Shutdown()
Fixed! UE-30985 Reflective surfaces rendering incorrectly in -featureleveles2 -opengl
Fixed! UE-31431 Crash in Sequencer play rate track when setting negative play rate
Fixed! UE-31647 Crash changing the color of a fade track section
Fixed! UE-31648 Sequencer audio doesn’t play after rendering a movie in editor.