At our high school, we are running mas 90 4.0 on a Novell Netware 6.0 server SP3. The workstation is runnign XP pro SP1, NW Client 4.90.0.0 SP1a and McAfee 4.5.1 with SP1a. We are having to reboot the server several times per day because file get locked on the server and cannot be opened. Workstation meets all support platform matrix requirements. Connection is 100MB full duplex. Server also meets and exceeds all requirements. I have installed 481mas90.exe to edit registry to take care of concurrency issues and file locking issues. User has supervisor rights to the directory on the server. I have found nothing about flagging files in a certain manner. I know every database I have ever worked with before that some files must be flagged shareable, but can find nothing about this with respect to mas90. The files that keep getting lockes are the *.soa files. Looking for a solution. THanks, David