Indesign CS5.5 cannot open CS5.5 indesign file

Question

Hello all,
I created an InDesign CS5.5 file yesterday and today i can't open it anymore from the officer server.
When the file is on the server at the office and i try to open it, a pop-up shows this:
"Cannot open the file "filename.indd". Adobe InDesign may not support the file format, a plug-in that supports the file format may be missing, or the file may be open in another application".
It doesn't work for any other InDesign files on the server neither and it is not open in another application or on another computer at the office.
When i transfer that file on my desktop it works fine, but i can't work that way at the office of course.
Has someone an answer to that ?
Thank you,
Thierry
--------------------------------------------- EDIT ---------------------------------------------
For all who have this error, restart your machine and it works fine!
Cheers,
Thierry

Answer 1

Since you've shown us the folder contents it's a good bet it isn't in use (no lock file). And it doesn't look like the file is mis-named as there doesn't seem to be anything else there that would be the .indd file (but just in case, open it in TextEdit and paste the first few lines here so we can see what the file header says), so the most likely case is the file is damaged. Is that on a removable device of some sort?
You can try the tool at Repair corrupt InDesign Adobe files on Mac OS X  or send me a link to the file by private message and I'll try the recovery tool I have for Windows.