Engine crashes when opening blueprints or running project

Hi Everyone,

I am having an issue where if I open an actor blueprint or if I attempt to run my project then the engine will crash. I can open HUD bps, and I can open materials, but if I open anything else then Unreal will crash.

At first it would crash when I loaded the engine but after I deleted the game map and created a new one it now only happens as I have described above. I deleted no assets and there was actually nothing on the map. I can think of no major changes I made to any of the blueprints or project settings.

Here is the last section of the error log:

*[2017.06.10-21.13.14:741][ 0]LogLoad: (Engine Initialization) Total time: 34.18 seconds
[2017.06.10-21.13.14:741][ 0]LogLoad: (Engine Initialization) Total Blueprint compile time: 0.08 seconds
[2017.06.10-21.13.14:741][ 0]LogExternalProfiler: Found external profiler: VSPerf
[2017.06.10-21.13.14:741][ 0]LogExternalProfiler: Using external profiler: VSPerf
[2017.06.10-21.13.14:755][ 0]LogOcInput: OculusInput pre-init called
[2017.06.10-21.13.14:755][ 0]LogHMD: Starting GearVRController plugin
[2017.06.10-21.13.14:777][ 0]LogContentStreaming: Texture pool size now 1000 MB
[2017.06.10-21.13.14:841][ 1]LogAssetRegistry: Asset discovery search completed in 18.5711 seconds
[2017.06.10-21.13.14:843][ 1]LogCollectionManager: Rebuilt the object cache for 0 collections in 0.000001 seconds (found 0 objects)
[2017.06.10-21.13.14:843][ 1]LogCollectionManager: Fixed up redirectors for 0 collections in 0.000043 seconds (updated 0 objects)
[2017.06.10-21.13.18:860][456]LogSlate: Took 0.005598 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Slate/Fonts/Roboto-Light.ttf’ (159K)
[2017.06.10-21.13.33:905][ 57]LogSlate: Took 0.000185 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Slate/Fonts/Roboto-Light.ttf’ (159K)
[2017.06.10-21.13.33:959][ 57]LogMaterial: Missing cached shader map for material GuideRailMaterial, compiling.
[2017.06.10-21.13.34:096][ 57]LogMaterial: Missing cached shader map for material GuideRailMaterial, compiling.
[2017.06.10-21.13.34:110][ 57]LogMaterial: Missing cached shader map for material GuideRailMaterial, compiling.
[2017.06.10-21.13.34:152][ 57]LogMaterial: Missing cached shader map for material FMatExpressionPreview MaterialExpressionVectorParameter_0, compiling.
[2017.06.10-21.13.34:177][ 57]LogSlate: Took 0.007806 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Editor/Slate/Fonts/Roboto-BoldCondensed.ttf’ (158K)
[2017.06.10-21.13.34:380][ 58]LogSlate: Took 0.007314 seconds to synchronously load lazily loaded font ‘…/…/…/Engine/Content/Editor/Slate/Fonts/Roboto-Italic.ttf’ (157K)
[2017.06.10-21.13.37:146][279]MaterialEditorStats: Info Base pass shader: 80 instructions
[2017.06.10-21.13.37:146][279]MaterialEditorStats: Info Vertex shader: 29 instructions
[2017.06.10-21.13.37:146][279]MaterialEditorStats: Info Texture samplers: 1/16
[2017.06.10-21.13.39:539][333]LogWindows: Windows GetLastError: The operation completed successfully. (0)
*
Thank you in advance for any help.

Ok so for anyone else suffering from the same issue I found a very odd solution. If you can locate which blueprints are causing your game to crash (a lot of trial and error), open them in Notepad++ but don’t change anything. I just opened my two broken blueprints and scrolled through them. After I closed them I booted up the editor and it worked like new. I have no idea why this worked but it did…

Im having the same problem and i know the blueprints that are causing it. But i tried your “solution” and it didnt work, UE crashes as soon as it loads the project. I really dont understand why your solution will work, you are not saving the file again and you are not doing anything with the file. Are you sure that you just didnt have luck and the problem just fixed by itself?

Has anyone found a solution here that makes sense?