I have two Xerox Workcentre copiers. They are both setup on the network and scan to the same location. We are having an intermittent problem with the machine locking up after scanning a document. The first item might scan fine (in fact, you can scan several and they all work fine) but then you hit one that locks up while it says transferring. When we check the scan folder it shows a lock file for that document and will never complete. We are forced to reboot the machine. When it comes back up the file may or may not complete. Sometimes it shows up as a complete file, and other times it shows as a 0kb file along with a lock folder. We have not found a rhyme or reason as to why some fail and others do not, nor as to why some files will complete after reboot and others will not. This problem happens on both machines and doesn't seem to be any different on either one. Please advise.