Unreal Engine Issues

Crash in FMediaPlayerBase::TickPlayer in Shipping builds

A crash can occur in FMediaPlayerBase::TickPlayer in Shipping builds. This is because FMediaPlayerBase::NativePlayer is not a thread-safe shared pointer. The fix is to make it ESPMode::ThreadSafe. ...

Crash when using "Convert to Variable Curve"

Error message: Access violation - code c0000005 (first/second chance not available) Source Context: 7 8 DECLARE_CYCLE_STAT(TEXT("AnimSeq EvalCurveData"), STAT_AnimSeq_EvalCurv ...

Game crashes when Panini projection enabled.

Crash When Trying to Draw a Material to a Render Target where Source Material is using AlphaComposite + Unlit Mode

The issue occurs when trying to Draw a Material to a Render Target where the source material is using AlphaComposite + Unlit mode. This is an attempt at the solution proposed by Ryan Brucks to allow ...

Blueprint Struct associations in Blueprint hierarchy causes command line cooker to crash

If a user creates a specific Blueprint hierarchy with a Blueprint struct, it can cause a issue when the Blueprint struct is being cooked. User description of Blueprint(s) and Blueprint Struct relat ...

Crash when setting Anim to "None" with URO

A Crash can occur when setting a skeletal mesh's animation instance to None when it has Update Rate Optimizations enabled. An unverified proposed fix for this is to remove the nullptr check when ...

Crash serializing LAN query response in OnlineSessionInterfaceSteam

Server will crash in FOnlineSessionSteam::AppendSessionToPacket due to the OwningUserId being null. ...

Alembic Skeletal Mesh not Being Lit Correctly

When importing an alembic skeletal mesh with an animation that changes the overall form of the object rather drastically it will be lit as if at the end of the animation. To view this you need to ha ...

[CrashReport] Linux crash - FVulkanCommandBufferManager::WaitForCmdBuffer

This is a semi-common Linux crash coming out of 4.17.1. It is spread among a few different similar callstack affecting a handful of users. [Link Removed] [Link Removed] [Link Removed] [Link Removed ...

Crash in MobilePatchingLibrary OnInstallComplete when install fails

Crash in MobilePacthingLibrary.cpp in the function static void OnInstallComplete FText ErrorText = MobilePendingContent->Installer->GetErrorText(); It looks like MobilePendingConte ...