Crashing when pushing Play

Seems to be a BP issue.

I updated my SVN and also did a revert but to no avail.

Assertion failed: Enum [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.2\Engine\Source\Editor\BlueprintGraph\Private\K2Node_CastByteToEnum.cpp] [Line: 17]

Stack:
Address = 0xdaedd866 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xdad7d275 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xdbde0c6a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xdbe06883 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xdbdc4c67 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xd7ca3363 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd7ca3824 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xe19ee376 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a267db (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a19004 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe19f9eb8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a41f1d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2696e (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a26203 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a26203 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3e4b2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1e3a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50c5d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50d89 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4feca (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2c6f0 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4f260 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a27ed8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3973a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1d72 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Addre

Address = 0x3805bf8 (filename not found) [in C:\Windows\system32\KERNELBASE.dll]
Address = 0xdaedc1dc (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xdad8b94a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xdad7d320 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xdbde0c6a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xdbe06883 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xdbdc4c67 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-BlueprintGraph.dll]
Address = 0xd7ca3363 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd7ca3824 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xe19ee376 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a267db (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a19004 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe19f9eb8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a41f1d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2696e (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a26203 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3d504 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a26203 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3e4b2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1e3a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50c5d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50d89 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4feca (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2c6f0 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4f260 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a27ed8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3973a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1d72 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50c5d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50d89 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4feca (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2c6f0 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4f260 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a27ed8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3973a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1d72 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50c5d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50d89 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4feca (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2c6f0 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4f260 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a27ed8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3973a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1d72 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50c5d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a50d89 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4ffb2 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4feca (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a2c6f0 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a4f260 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a27ed8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1a3973a (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af1d72 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1af8691 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1afd31d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xe1afce3d (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0xd8e714b8 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-Engine.dll]
Address = 0xd7807f11 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd7825524 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd7835a4b (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd7635265 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0xd79f0606 (filename not found) [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
FEngineLoop::Tick() 0xe8697b03 + 0 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launchengineloop.cpp:2091] [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor.exe]
GuardedMain() 0xe868d1ec + 0 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launch.cpp:132] [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor.exe]
GuardedMainWrapper() 0xe868d25a + 5 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:125] [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor.exe]
WinMain() 0xe8699119 + 17 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:207] [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor.exe]
__tmainCRTStartup() 0xe8699fa9 + 21 bytes [File=f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618] [in C:\Program Files\Unreal Engine\4.2\Engine\Binaries\Win64\UE4Editor.exe]
Address = 0x41416ad (filename not found) [in C:\Windows\system32\KERNEL32.DLL]
Address = 0x6154629 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]
Address = 0x6154629 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]

Any Ideas?

Try rebuilding your blueprints one by one, maybe that will narrow down your problem to a particular BP.

Hello,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes.

If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, please submit a new report for it.

Thank you