Logic Pro 9 Can't save a song

[yore]

Hi,
I've been getting a strange error with Logic 9.0.1 when trying to save a song I can't ? I just get a dialog saying can't save the song. I then go on and save it as a different version and then it's OK. Anyone else ?

 

[Eli]

Did you by any chance move the project or project folder while the project was open?

 

[yore]

No. Everything was fine up to the point when I tried to save it. This has now happened twice so I'm in the 3rd version of my song. Now the song has lots of synths and stuff and I've had a few low memory warnings so maybe that has something to do with this ? Anyway because of that I've been using BIP files and making sure that the synth/audio bounced is also opt-clicked on the channel strip so that it won't load and use memory.