[4.6.1] Engine crashes on PIE after changing Default or Blueprint settings

It’s really strange. It will work fine from a fresh opening/save, but it will crash if you click “Play” after changing a setting, (jump height in MyCharacter Blueprint for example).

If you save setting before inevitable crash on PIE, setting will be saved and it will Play OK. It’s simply after any change.

I don’t expect you to be able to replicate it in house without them, so there’s a link to project files here:

Here’s Crash info too:

MachineId:DEDEC7004208840EE5F238B1CE92D4CE
EpicAccountId:544aa2b961644198bbde663ad21849e5

Unknown exception - code 00000001 (first/second chance not available)

Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Runtime\CoreUObject\Private\UObject\WeakObjectPtr.cpp] [Line: 78]
[Index:1811939328] exceeds maximum number of UObjects, [Block:110592] increase MAX_SERIAL_NUMB

KERNELBASE + 37901 bytes
UE4Editor_Core + 3092349 bytes
UE4Editor_Core + 1597391 bytes
UE4Editor_CoreUObject + 1670333 bytes
UE4Editor_CoreUObject + 1674729 bytes
UE4Editor_CoreUObject + 1661873 bytes
UE4Editor_CoreUObject + 1556281 bytes
UE4Editor_CoreUObject + 689886 bytes
UE4Editor_CoreUObject + 1555953 bytes
UE4Editor_CoreUObject + 689886 bytes
UE4Editor_CoreUObject + 1157578 bytes
UE4Editor_CoreUObject + 1149510 bytes
UE4Editor_UnrealEd + 9739282 bytes
UE4Editor_UnrealEd + 10074675 bytes
UE4Editor_UnrealEd + 10045544 bytes
UE4Editor_UnrealEd + 9881715 bytes
UE4Editor_UnrealEd + 4557402 bytes
UE4Editor_UnrealEd + 4660963 bytes
UE4Editor_UnrealEd + 1801811 bytes
UE4Editor_UnrealEd + 6686342 bytes
UE4Editor!FEngineLoop::Tick() + 3876 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:2214]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Duplicate of [4.6.1] Engine crashes on PIE after changing Default or Blueprint settings - Blueprint - Epic Developer Community Forums