I got a big problem with the new Unreal Engine 4.12. I updated my game from 4.11 to 4.12 and everything was and is working great in the Editor (Play in Editor and Standalone). Now, as each weekend I tried to pack a new build to upload it for testing. Unfortunately the packing now fails with an fatal error under 4.12
Is there already a solution for this problem? The error message isn’t that usefull for me …
Found the solution. The conversion to 4.12 or a crash corrupt a map that forced the failure while cooking.
Copied the Map from the 4.11 backup and now it’s working great.
I have this exact same problem. Game will no longer package in 4.12. I cannot go back to the 4.11 version of my map as it was several weeks worth of work ago. Completely stuck.