I can't import worlds and the forums dont have any answers

[gar 24]

It just said "could not use file, check that it isn't used by another process" can someone please help? I don't know how to check that it isn't used by another process and the forums don't help 

[Keep on Chucking 6.9k]

I get this error too sometimes, what I would do is a few different steps:

1. Shut down Minecraft, and go into taskmanager and shut down any instance of minecraft/java whatever etc.
2. Try and import the world.

Does it import now?

Yes. GOOD!

No.
3. Shut down every instance of mine-imator (after saving) (in task manager of course)
4. Restart mine-imator and import the world

Does it import now?
Yes. GOOD!

No.
5. Restart your computer
6. Restart mine-imator and import the world

Does it import now?
Yes. GOOD!

No.
7. Make a seperate copy of the world.
8. Import the copy instead of the original.

Does it import now?
Yes. GOOD!

No. Then I'm out of options I guess.

[gar 24]

thanks