4.6.1 Editor stalls on 72% loading

When starting the editor after upgrading to 4.6.1, it keeps stalling on 72% loaded. Sometimes, it’ll keep going if I leave it for about 20 minutes, but now it’s stopped working altogether. I’ve tried migrating the project, deleting my cache and completely reinstalling UE.

I’m completely stumped, and I can’t get any work done. I’m unsure what logs to provide, but I’ll supply any information neccesary. Any help will be greatly appreciated.

Hi Jargon,

First, try verifying the install. Click the yellow down arrow on the launcher version card and choose ‘Verify’.

If that doesn’t repair the issue, follow the link below and post your dxdiag, Log, and Dmp files.

Hey TJ,

Thanks for getting back to me.
I’m currently using these binaries and specs:

Launcher: 1.9.2-2361519+++depot+UE4-LauncherLive
Engine: 4.6.1-2386410+++depot+UE4-Releases+4.6 (4.6.1 Launcher Binary)

DxDiag: link

However, I think I found the issue - I have attempted to move my derived data cache off my C:/ drive by adding this to my project’s DefaultEngine.ini:

[InstalledDerivedDataBackendGraph]
Boot=(Type=Boot, Filename=”%GAMEDIR%DerivedDataCache/Boot.ddc”, MaxCacheSize=512)
Local=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, PurgeTransient=true, DeleteUnused=true, UnusedFileAge=34, FoldersToClean=-1, Path=”%GAMEDIR%DerivedDataCache”)

As far as I can see in the log, the editor isn’t saving the cache and is rebuilding everything every time it starts up. Is this the correct way to move the DDC?

Take a look at this documentation.

I believe what you are looking for is the bit of code mentioned under the ‘Using a Local DDC’ section.

If that doesn’t work, let me know.