I broke UE4

hi

I am using 4.6.1

if you found the title useless/confusing you know how i feel after a problem like this

i needed to migrate a blueprint for one project to the other. Migrating copies the asset and all the dependencies (I only wanted that one blueprint) and exporting works, but importing does nothing

i thought a can try to copy the blueprint file itself (what could go wrong?) well…****

if i do anything other then left clicking on the asset, ue crashes

callstack

[]

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

Assertion failed: Result != NULL [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphNode.cpp] [Line: 98]

KERNELBASE + 23544 bytes
UE4Editor_Core + 3092349 bytes
UE4Editor_Core + 1597688 bytes
UE4Editor_Core + 1479058 bytes
UE4Editor_Engine + 12132706 bytes
UE4Editor_BlueprintGraph + 1639503 bytes
UE4Editor_KismetCompiler + 403476 bytes
UE4Editor_KismetCompiler + 415220 bytes
UE4Editor_KismetCompiler + 359446 bytes
UE4Editor_KismetCompiler + 370653 bytes
UE4Editor_KismetCompiler + 368930 bytes
UE4Editor_UnrealEd + 9596511 bytes
UE4Editor_UnrealEd + 9619606 bytes
UE4Editor_UnrealEd + 9621607 bytes
UE4Editor_CoreUObject + 626800 bytes
UE4Editor_CoreUObject + 946322 bytes
UE4Editor_CoreUObject + 1054484 bytes
UE4Editor_CoreUObject + 878004 bytes
UE4Editor_CoreUObject + 686086 bytes
UE4Editor_CoreUObject + 1094210 bytes
UE4Editor_CoreUObject + 946764 bytes
UE4Editor_CoreUObject + 1054484 bytes
UE4Editor_CoreUObject + 944791 bytes
UE4Editor_CoreUObject + 947419 bytes
UE4Editor_CoreUObject + 1062891 bytes
UE4Editor_CoreUObject + 1460613 bytes
UE4Editor_CoreUObject + 1511826 bytes
UE4Editor_CoreUObject + 1580292 bytes
UE4Editor_ContentBrowser + 1750098 bytes
UE4Editor_ContentBrowser + 969241 bytes
UE4Editor_ContentBrowser + 1874922 bytes
UE4Editor_ContentBrowser + 85107 bytes
UE4Editor_ContentBrowser + 119737 bytes
UE4Editor_ContentBrowser + 1338249 bytes
UE4Editor_Slate + 2490858 bytes
UE4Editor_Slate + 2543118 bytes
UE4Editor_ContentBrowser + 1977818 bytes
UE4Editor_ContentBrowser + 1908756 bytes
UE4Editor_Slate + 427589 bytes
UE4Editor_Slate + 156365 bytes
UE4Editor_Slate + 832709 bytes
UE4Editor_Slate + 770598 bytes
UE4Editor_Core + 2484765 bytes
UE4Editor_Core + 2400763 bytes
UE4Editor_Core + 2489275 bytes
UE4Editor_Core + 2387186 bytes
user32 + 9268 bytes
user32 + 8855 bytes
UE4Editor_Core + 2490486 bytes
UE4Editor!FEngineLoop::Tick() + 3434 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:2193]
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]

[/]

even after deleting and (correctly) migrating the asset the problem persists

i have no idea how to force ue to recheck all it’s files

Any help is appreciated

Hi ,

You should be able to manually pull the blueprint from your project by going to \Unreal Projects\PROJECTNAME\content\ and find the individual blueprint .uasset. Once you have done this you can pull the file or you can go into your backup file \Unreal Projects\PROJECTNAME\saved\backup\ and find a previous copy of the .uasset before it broke to replace it. For the crash, however, please post this to the answerhub at http://answers.unrealengine.com in the bug reports section so we can assist you in depth. In the answerhub post, make sure to include your crash logs, dxdiag, and reproduction steps for us to be able to reproduce the error.

For your crashlogs, go to \Unreal Projects\PROJECTNAME\saved\log\ and pull the log from the most recent crash.

To get your dxdiag (Windows):

Go to your windows start menu and enter cmd in the searchbar. Open the command prompt window that appears, type dxdiag and press enter. You can save this information as a .txt document.

i did the above and i am waiting

anyone else might know about this?

now to add oil to fire, ue4 doesn’t want to verify itself

Hi ,

Sorry for the delay, I have been out sick for several days. What steps are you taking when you attempt to verify the engine? Additionally, can you link the answerhub post here so we can keep everything concise? Thank you!

I go to: Epic Games launcher -> Library -> Engine Versions -> 4.6.1 -> “arrow next to launch” -> verify

what happens: initializing -> Downloading 0/231.7kB -> Installation failed: could not download patch data. Please try again later