Crash on open project 4.12.4 version

Hİ,everyone.Today i uptaded my ue4 version to 4.12.4 .Then when i wanna try to open my project on UE4.I get a problem.İt s kind of crash problem.İ dont have any problem my the other projects about crash screen.But just has a crash screen problem to on my “Labirent” project.But i should say something about "Labirent"project.My “Labirent” project has two level.İ can open the “Labirent Level1” without any crash problem.But when i try to open the other level which is in “Labirent” project.İ get the crash screen problem.

Zippyshare.com - [now defunct] Free File Hosting (LABIRENT-backup-2016.07.01-10.25.03.log)

Zippyshare.com - [now defunct] Free File Hosting (CrashContext.runtime-xml)

http://www100.zippyshare.com/v/hyzgV2o8/file.html(UE4Minidump.dmp)

http://www100.zippyshare.com/v/OSXnZLge/file.html(download.error)

I’m having the same problem too. It’s happened to me every since I first downloaded 4.12.4.

Yes,like me

My theory is that this happens when you try to open a project that has had to be converted from an older version of UE4. I just tried creating a fresh new project from the project screen when you first launch UE4. It was a blank project with no content whatsoever (not even the starter content pack) and it works just fine.

I had crashes on opening certain maps after we upgraded our project from 4.10 to 4.11. I ran the editor with visual studio debugger, caught the crash and just went down through the call stack looking at variables until I dug up the name of the exact item that caused the crash when it was loaded. Then I opened the game with the old version and went level by level removing problematic items. Replaced those items later in 4.11 and everything works fine now.

it was uptaded 4.12.3 - 4.12.4.i tried to open blank project.Then i back to my the other project which has crash,all of thing is same(crash)

Bro,i found a folder in my project (which has crashes) and i entered UE4Minidump.dmp.Then i clicked “Debug with Native Only”,the i got a problem.That’s it.

So this must be to do with some of the content I have in my contents folder that I need to remove? I just need to run the debugger to catch which assets exactly are causing this problem.