Error bys saving .comp

Hi
I have a problem to save a project in .comp. Until now I didn't have any problems...for saving work.
I try to load a .fv file (flash) and the program stop to work. Well! I made another file .mov. And I got the
problem by saving the file. So I took a file (clip) .mov original but that was the same
The fanny thing is that I can render, make color change with CC tool and save
it in final as a mov file but the project file don't want to be save. I have the window
"Error while saving composition1.comp The newly saved version is called composition1.tmp.
When I take an older project file it does work.Where is the problem?
Thanks
regards
David

Well. I did use a clip I stabilize in premiere element and export ii first in .fv and then in mp4 where I change the ending in .mov. When I take the original clip I have no problem. I would be interested to know why Fusion didn't like the stabilize clip or is that because it didn't have the right file format. And then where do I find the file format fusion works with?
Thanks
david

i got this message, after running a script, who is writing a *.comp files.
So maybe the opened files is locked, try to save as a different name.

this problem, has nothing to do with stuff in your comp!