We checked the server and as far as we can tell it should have plenty of space. We reboot and it usually works for the next hour or the next few weeks before getting this message again. We usually start by rebooting the Linux server, then the internet server, then the routers in that order. We reboot one at a time and check to see if there is any improvement. Is there a certain amount of space or number of files allowed in a directory or do we have to set a certain size for a particular director. All information is welcome for I know very little of the linux server because we were handed it after a downsizing of the company.