Weird behaviour on client-server

Had a really weird one at a customer site today. They are running OnLine 6.00.UE1P4 on big-ish HP box and accessing it from Gupta SQL Windows and I-Net 5.01. For reasons that are too tedious to explain, we re-installed OnLine this morning. We just reinstalled it to the same place. All the onconfigs and the sqlhosts file were saved and put back. No data areas were touched. Now, dbaccess works perfectly, but the Gupta applications get -329 (Database does not exist or no system permission). We tried all the usual knee-jerk stuff like re-booting the server and PCs. Can anyone come up with any suggestions before I tear my little remaining hair out? Thanks, akent@cix.compulink.co.uk (Andy Kent) -------------------------------------