4.17 Crash on Play

[GameMaster79]

Hi,

UE4 is crashing on me about 30% of the time I hit play and about 10% of the time I compile.

This is the info I get. The second line the one that ends ccp:349 is always the same. I want to know if there is anything I can do and if this is a known bug that will be fixed soon?

Thanks,

Assertion failed: Src [File:D:\Build++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp] [Line: 2245]

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_CoreUObject!UScriptStruct::CopyScriptStruct() [d:\build++ue4+release-4.17+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:2247]

[Lord7even]

I had the same problem and my bug was to pass a reference to a construction script (Spawn actor from class).
reference outputs are diamond shaped while copies have a circle as output pin. The reference output was new in 4.16 or 4.17. Hope that helps…

[GameMaster79]

Yeah that sounds like it could have been it. I move everything I could out of construction scripts to begin play. But honestly the problem did not fulling go away until 4.17.2.