Failed to open map file

Development Programming & Scripting Blueprint
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1

I was creating a map in Unreal and the past few hours, it started getting really laggy. When I would move an object, it would take 5-10 seconds for it to register and it would almost freeze up. In an attempt to solve the issue, I saved my map, restarted my computer, and when I attempted to open the file back up. I got this message:

“Failed to open map file. This is most likely because the map was saved with a newer version of the engine.”.

This is extremely frustrating considering this is my fist experience with this engine and it’s started out as a bad one.
If there is any bit of advice you can give me, or potentially a solution, that would be great. One more thing to add:
This file size is fairly large and the map size I had at the time was really big as well, although, I don’t think that should have caused detrimental issues like this. Also: My computer is very well capable of doing anything I throw at it, so any performance related issues can be thrown out the door.

Thanks in advance,

Frank

2

Also, it was not done in a newer version. I did this in the latest version, and opened it in the latest version. There’s another possibility thrown out. Thank you!

3

Bump?
It is vital the I get this issue fixed.

4

FU!!!K MY TEAM HAS A 14 MOUTH PROJECT FROM UNREAL ENGINE 3 NOW DOING IT IN 4 …YOU LOST NOTHING !!! IT JUST HAPPENED TO US!!! :frowning: what a waste of time

5

I actually figured it out. Just use a back up that’s in your saved folder of the project.

6

lol me too thanks though haha Wow i must of been angry

7

Guys, I used a backup aswell but MyCharacter blueprint has gone missing. And I can’t import it back into my project :frowning: