maybe I was not clear enough on Friday, PLEASE - all the people who know something about Lotus Notes, tell me what special things might be there that keep Samba from working normally with these two or three *.DSK files. If these files are on a so called "real" NT Server it works without problems, if they're on Samba there is a problem. A user starts Notes client, opens some databases and leaves his workstation for about twenty minutes. After that Notes client freezes with any action the user takes. The Windows error message is "Unexpected network error". As written below, I have tried some options with Oplocks but had no luck. I cannot believe when Notes shall be so successfull at all that there is nobody who ever tried version 5.0.3 (on Windows) with these files on Samba. There are reports that Notes 4 did indeed work on Samba without these problems. What did they change? Thanks for any hint, Tobias ------- I have Lotus Notes 5.0.3 and the respective Notes client on a winframe server and several ICA clients as workstations. I don't know very much about Lotus Notes, other guys are managing it, all I can see is that the client is configured to create some files in the user's home directory called CACHE.DSK, DESKTOP.DSK and maybe some more. The home directories are on a Samba 2.0.5a server. Everything works without problems there except this Notes client. The symptom is: Every time a user is logged in to Notes client but doesn't touch it for about 20 minutes. When she tries to use it again after this break, it freezes immediately with an "unexpected network error" message. This happens always, perfectly reproducable. If I move the home directories to a "real" NT server, Notes client doesn't show this behaviour. What I tried is to tell Samba to refuse Oplocks for these files (*.DSK), then I switched off Oplocks for the whole home share. I fiddled with socket options and double checked the overall configuration but I had no success at all. Desperately looking for a hint where to search next!