Hi everybody, I am completely new to MonetDB and have just compiled the latest SuperBall release on OS X. I set mapi_open to true in the config file /etc/monetdb5.conf because for some reason MonetDB would not use "localhost" but the machine name of my box as an address to listen on. I had to manually add that to /etc/hosts in order for it to refer to 127.0.0.1 at least. Maybe an OS X oddity. I start the merovingian process which seems to run fine. After that the only time I can connect successfully to a database using mclient (or any other client) is the first time I try to connect (if it works at all). For example ./mclient -lsql --database demo !InvalidCredentialsException:checkCredentials:Invalid credentials for user 'monetdb' Sometimes it would work just once but the second time with the same command line I would not be able to log in. The merovingian.log does not seem to contain any helpful messages. Any hints would be very helpful as currently I can not use MonetDB at all. Cheers, Richard