Unreal Engine Issues

Changing blueprint default values inside arrays only updates loaded child blueprints

The rules for delta serialization in UE4 are complicated, and the editor tries to hide them from you, which works 90% of the time but can lead to confusion and data loss in other situations. In the ...

Duplicating BP actors reset edited Variables to Default Value if Variables name start with Chinese Character

Hints: It has no problem in 4.24, only happening in 4.25 It has no problem as long as the Variable name is contained with Alphabat(English characters) fully; or start with Alphabat(A_变量 is fine) ...

Core Class Redirect doesn't work when converting from a C++ class to a BP

The Export map will properly be updated but the creation of the import will fail with SourceIndex == INDEX_NONE From MarcA:  I'm guessing the import source index is always none for native classe ...

Array property of a User Defined Struct is corrupted when additional properties are added to the struct

Modifying a UserDefinedStruct can lead to data corruption in Blueprint array properties. ...

Asset Registry GetDerivedClassNames does not work properly during editor startup

This bug comes from https://udn.unrealengine.com/questions/585499/view.html which describes a problem where a licensee is trying to use the AssetManager to scan a primary asset type that is generate ...

If enable iostore and run BulkData.lock twice on the same frame, the second time get pointer will be nullptr

[CrashReport] UE4Editor-Core!UnhandledException(_EXCEPTION_POINTERS *) [WindowsPlatformCrashContext.cpp:1457]

Generated from CrashReporter ErrorMessage: 64 (82%) Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff 7 (8%) Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading add ...

Incorrect conversion when using FUnitConversion::Convert

Incorrect conversions values received and using FUnitConversion::Conversion ...

GitHub 6986 : Fix FXmlFile parser for subversion

See https://github.com/EpicGames/UnrealEngine/pull/6986 (shelved in CL 13594767) If a subversion commit message had a quote in it, the xml parser was breaking. Now only do quote handling inside qu ...

Template function TSparseArray::PointerToIndex does not compile

Error:  C:\Program Files\Epic Games\UE_4.25\Engine\Source\Runtime\Core\Public\Containers/SparseArray.h(778): error C2440: '-': cannot convert from 'const TSparseArrayElementOrFreeListLink<TAlignedBy ...