If the person already exists in the University wide LDAP database then please use the user id that has already been assigned to that person. If the acroread command stops working on a Sun there is little that can be done but reboot the system. This appears to be a problem with the cache file system getting confused. The only way I know of to clear the problem is to reboot the Sun. Please check for any long running jobs before rebooting the system.
Folks can always run acroread on another system.
If it is determined that a hardware failure has occurred you will first need to determine if the equipment is covered under a maintenance contract or if you are willing to pay for time and materials service on equipment not under contract. As of this writing no SGIs are on a hardware contract and only a few Sun systems are under contract. Most new Dell PCs are under warranty except for the oldest of systems. Contact CIT Hardware Support for service calls on Dell PCs and HP printers. See the list of vendor contact information for phone numbers and other required information.