can`t save the project

To whom it may concern,
I have recently migrated my scrivener account from my old mac (10.5.8) to my new mac (10.8). The registration was with no problem, but after opening one of my files and trying to save it, I got this error report: error saving project. What does that mean, and how can I fix it?

Best regards,

Eva Dovc

Have you upgraded your operating system to 10.8.1 yet? If not that is the first thing you should try. 10.8 has a few bugs, and that cleared some of them up. Also, what version of Scrivener are you using?