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How good is UE4 with bugs?

Hi

This is more of an angry shout then a question

I have an error caused buy dragging and dropping a set on another set (replacing one with the other: not really important)

Error:
Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff

UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1f391e) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1b3b9d) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2ebbf7) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2186de) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2ebdf1) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2186de) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d28a9ca) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1def35) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e70b1b) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e8ce32) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d209070) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d209004) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257092) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271714) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2465b4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d217806) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d27b242) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d25724c) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271714) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d256a97) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2574db) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2737eb) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2d4985) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d29342f) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d293792) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257cc4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271789) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2465b4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d27b242) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1d03b4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1e52d0) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d256f6c) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2574db) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2737eb) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2d4985) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d29342f) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d293792) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257cc4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271789) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2465b4) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffe357bf924) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2ebd93) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d21dcba) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d21d642) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d28a94c) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d288a46) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d27b242) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e70b68) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e70b70) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e70b70) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffe33e8ce3a) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d209070) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257092) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2574db) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2737eb) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2d4985) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d29342f) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d293792) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257cc4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271789) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d25612b) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271714) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d256a97) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2574db) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2737eb) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2d4985) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d29342f) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d293792) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257cc4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271789) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2465b4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d27b242) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1d03b4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d1e52d0) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d256f6c) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2574db) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2737eb) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2d4985) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d29342f) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d293792) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d292722) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d257cc4) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d271789) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2465b4) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffe357bf924) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2ebd93) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d21dcba) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d21d642) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2ebe20) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d2899aa) + 0 bytes [UnknownFile:0]
UE4Editor-CoreUObject.dll!UnknownFunction (0x00007ffe3d21dcba) + 0 bytes [UnknownFile:0]
UnknownModule!UnknownFunction (0x000014978dec9a3e) + 0 bytes [UnknownFile:0]

the irritating part of it is i get this on start-up

that is good unless:

Screenshot_1.png

this feature NEVER EVER worked with me

I lost about 10hrs of work from this, what should i do

First of all, you should report what UE4 version you using.
Then, try to compile UE4 in debug and reproduce the crash, then at least we can see where actually in source code crash has been happened.

You need to setup source control for the source control restore to work. Try setting the project up as a git repo. And if you are losing 10 hours worth of work then you must have changed the auto save settings or turned it off completely.

Sorry for the ambiguity in the previous post:

i am using ue4.6.1

I am using a pure blueprint implementation and i have no knowledge of how to run in debug mode without having c++ code

from what i know, above feature is there to restore from the “~/my project/Saved/Backup” and not from source control

I am using the prebuilt version of the engine with no change to settings (other then simulator quality controls)

last time i tried setting up github plugin in a project, the whole thing crashed and became unusable (every time i open the project, it says that the executable is built for another version of ue [4.7] i am using 4.6.1)