Unreal Engine Issues

Blueprint nativization does not properly convert references to other Blueprint class types marked NotForServer/NotForClient during export tagging.

Example: Widget Blueprint classes do not get nativized for WindowsServer configs when 'Load Widgets on Dedicated Server' is false (i.e. NeedsLoadForServer() returns false). As a result, if another c ...

Impossible to reparent blueprint class that has a broken parent class when using compilation manager

Alternatively use BP_ParentClassIsMissingType in QAGame ...

Reference to child actor is invalid when compiling the parent blueprint

Reference to child actor is invalid when compiling the parent blueprint. In this example, when compiling blueprint 'A' the print string result will say that "Child Actor ref is INVALID". However, if ...

Crash upon adding an Interface to a Blueprint that has a function name that matches the name of a variable in the Blueprint.

When you add an Interface to a Blueprint that contains a variable with the same name as one of the Interface's functions, the editor will crash upon compiling the blueprint. In 4.16, this only cause ...

[CrashReport] UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReplaceInstancesOfClass_Inner() [kismetreinstanceutilities.cpp:1880]

This is a somewhat common crash that has occurred throughout the 4.17 release. Users have not provided any description of their actions when the crash occurred. The callstack is similar to some ol ...

Crash attempting to use a struct containing a deleted struct in a blueprint and compiling

REGRESSION: No, occurs in 4.17 (doesn't repro in 4.16 because orphaned pins wasn't a feature) Crash occurs when the user attempts to use a struct containing a deleted struct in a blueprint. ...

Ensure compiling a blueprint with itself as a Child Actor Component

Ensure occurs when the user creates a cycle with a blueprint containing itself as a child actor component. ...

WorldContextObject is null in BP function library

[CrashReport] UE4Editor_CoreUObject!FScriptArrayHelper::EmptyAndAddUninitializedValues() [unrealtype.h:2703]

This is a trending crash coming out of the 4.17.0 release. Based on user descriptions, this crash occurs on Play or Compile for affected users. User DescriptionsAgain crashing when I hit playIF I C ...

Actor Component instances have their settings reset to default when compiled in 4.17 (Compilation Manager)

REGRESSION: Yes, does not occur in 4.16 When converting a 4.16 project to 4.17, any actor component instances will have their settings reverted back to default when the user compiles the blueprint. ...