Carsten, I've tested the GoesCollaboration application in both modes. In the case of server-client mode my test involved solaris - NT. I'm not receiving the data_obs_1.data problem, so double check that the files exist in the same directory as that of where the server is running and make sure, if running in client-server mode, that you've followed the setup instructions. Please let us know if there are still problems, or you have any other questions. Tom Rink
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