File won't open

[jamesd]

I was working on an animation and half way through saving the battery died now when I try to open the file I get this error
I tried expander.xar but got as far as the new file was created but when I open it I get a couple of errors and then it opens an empty animation.
Is there any way of repairing the file?

PS. it is not a very important file, just something I was doing as a hobby