Auto-updating Fails - File could not be created on this disk

Hi,

I just activated the auto-update notification feature in MirrorSync 4.

My users are on Macbooks with FM16.

2 users have reported they see the following error:

" <thefile.fmp12> could not be created on this disk. Use a different name, make more room on the disk, unlock it or use a different disk" 

I have not had a chance to remote to anyone to check it out yet, but received these reports via email. They do have plenty of disk space.

Please advise.

Thanks,

ft.