I found this subject in the archives, and I am having the same problem I am running on Mac OS X 10.4.11 I built MonetDB from source from MonetDB-Feb2008-SuperBall I am new to MonetDB, so please forgive any ignorance.. Here's what I did: > monetdb create foo # create the db > mserver5 --dbname=foo --dbinit="include sql;" # start the db > ./mclient -lsql sql>CREATE USER "bar" WITH PASSWORD 'password' NAME 'Foobar User' SCHEMA "sys"; sql>CREATE SCHEMA "bar" AUTHORIZATION "bar"; sql>ALTER USER "bar" SET SCHEMA "bar"; > ./mclient -lsql -ubar Password:password sql>\q > ./mclient -lsql -ubar Password:password !InvalidCredentialsException:checkCredentials:Invalid credentials for user 'ifm' Two things: 1) I am able to login as user 'monetdb' without any problem 2) If i stop and start 'mserver5', I can login ONCE I know that I probably should be using 'merovingian', but I'm still playing around. Any pointers? Anything I can do to help debug? Thanks, -kevin