Issues with Crashes and Corrupted files after 4.7.4 Update

Hello, I’ve been working on 4.7.3 for a few weeks now after upgrading, but as soon as 4.7.4 was released my project crashed as soon as I tried to open editor. Added “.bak” to saved, intermediate, and config folders to attempt to get it to launch, and it did. Reintroduced saved and intermediate folders to engine and tried to launch, launch succeeded. Play in editor and opening “maps and modes” under project settings caused crashes. Deleted Default engine, reintroduced other config files in folder, engine launched correctly. Could access maps and modes and reset original values without crash. Play in editor working again without crash.

Attempts to open “Example_Map,” what was formerly default map to open when launching game or editor, still result in crash. Attempts to open or access my Game Instance Class (modeled heavily off of Multiplayer Shootout project in learning tab of UE4 Launcher) result in immediate crashes. These are three scenarios I have remaining that result in crashes.

Here is error I get in every crash, regardless of cause:
Access violation - code c0000005 (first/second chance not available) Full Log

In addition to my own project crashing, attempting to launch multiplayer shootout map from Epic (either copy I had previously downloaded, OR downloading it completely fresh from launcher) WILL result in a crash. Does anyone have ANY idea how to get crashes to stop and let me access my game instance class again ( map I’m less worried about. Already replaced it because it was faster than fixing it.)

Hi ,

We’re aware of this crash in 4.7.4 (UE-13274) and have fixed it internally. We should be releasing fix soon. In meantime, you can try opening a copy of project in 4.7.3 compiled from source via GitHub:

https://github.com/EpicGames/UnrealEngine/releases/tag/4.7.3-release

Note: that link will only work if you’re logged into GitHub and you have your GitHub and Unreal accounts linked.