Why does my .umap crash on load?


I have tired to open my game and it will pop up with a crash report saying “File name not found” take a look:

I am using Preview of 4.4 but I need to start working back on my game A.S.A.P. PLEASE HELP!

Thank You So Much!


When does this crash occur, specifically? Does Project Browser open, and crash occurs when opening your project? Is it only one project, or does this happen with every project? Do your projects still open in 4.3 before they’ve been converted? Are you able to open a new project in 4.4?

Please and attach your crash logs for project that is crashing. You can find that here:

On a Mac, logs are located in:
Engine/(project name)Editor/
Library Folder is hidden by default.
easiest way to get to it is by
having finder active application
and while holding Option Click Go in
Mac Menu Bar. This will expose


I had same problem. I’ve lost all my landscape!

Hey ,

Please provide information we asked for above. Thanks!

Hey all,

We haven’t heard back from you in awhile, so I am marking this post resolved for tracking purposes. If you are still experiencing this issue, please provide information requested above. Thanks!