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Unreal Engine Failing to Launch


I was working with UE for the first time in a while this weekend and today it's failing to launch. The error I get is as follows:

 Unknown exception - code c06d007e (first/second chance not available)
 KERNELBASE + 24684 bytes
 UE4Editor_Engine + 23178089 bytes
 UE4Editor_Engine + 21358229 bytes
 UE4Editor_Engine + 14743520 bytes
 UE4Editor!FEngineLoop::PreInit() + 9438 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launchengineloop.cpp:1143]
 UE4Editor!GuardedMain() + 236 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launch.cpp:111]
 UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
 UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:207]
 UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

I only have 4.0-4.2 installed as I haven't had the time to really dedicate to it until recently. 4.0 seems to launch but 4.1 and 4.2 fail.

Edit: System specs for info - i7 4790, 16Gb RAM, 770 GTX, Asrock Z79e

Product Version: Not Selected
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asked Oct 12 '14 at 06:36 PM in Installation & Setup

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avatar image WolfSpinach Oct 14 '14 at 06:46 AM

I'll renew my subscription and test on the new versions, I was looking forward to playing with UMG anyway.

Occasionally Maya or Softimage's user prefs get screwy and will cause them to crash or lock repeatedly so a common fix is to remove the user preferences folder. Is there an equivalent procedure in Unreal? Something that doesn't require a full re-installation - I'm on 3rd World internet and it'll take a couple of days to redownload :)

avatar image Steve Hardister ♦♦ STAFF Oct 14 '14 at 01:22 PM

Hi WolfSpinach,

Yes this is possible. Close UE4. Go to the drive where you installed UE4 (in this example "C"): Computer>Local Disk (C:)>UnrealEngine4>UE4>Engine>Config... Delete all contents within the Config folder then restart UE4. These items will be regenerated.

Hope this helps!

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Hi WolfSpinach,

Have you tried launching in the latest builds (4.4.3 or 4.5.0?) If this is not possible please follow the instructions in the following link in order to report a bug:



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answered Oct 13 '14 at 08:17 PM

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