disturbing problem in unity engine

hi, im having a bit of a problem in unity 3d engine. I dont know if it has anything to do with it, but i renamed the file, pluss tried the build settings for the first time. Then, when i opened the scene again after that, the whole level composition i had made was gone, and i got this message:

“Automatic import for…was disabled because the asset importer crashed on it last time. You can reimport the asset or rename it in the file manager to force reimporting it.”

All in all it says this on four different objects i had in the scene.

I still have all my objects and scripts etc in the inspector though, i didnt loose them. But it would have been nice if i didnt have to place all the objects over again. Does anyone know this problem, who could help me out??
I tried “re import all” without luck.

Did you rename the file in Unity or in the Explorer/Finder?

Sounds like Unity actually fails to import your files repeatedly. Submitting a bug might be a good idea.

Ok. I renamed it in Unity