UE4.5.1 Source code CRASH on start up

I downloaded and installed the unreal engine 4.5.1 source code and i get this error when i launch the editor

Does anybody know how to fix this?


Its complaining that the path to the DerivedDataCache is too long, I’d suggest either shortening the folders in the path so as not to breach 120 characters. Or you could take a look at BaseEngine.ini under the [DerivedDataBackendGraph]. There is a line “Root=(Type=KeyLength, Length=120, Inner=AsyncPut)” you could try adjusting the Length.