I want to change default monetdb user password to other and create new database user when starting new database instance, before any client connects to newly created db. I starting server with follow command: mserver5.exe --dbinit="oldpwd := clients.backendsum(\"monetdb\"); newpwd := clients.backendsum(\"secret\"); clients.changePassword(oldpwd, newpwd); usrpwd:=clients.backendsum(\"secret2\");clients.addUser(\"newuser\", usrpwd);" --dbpath="D:\Projects\git\monetdb-latest-dev\NT\build\bin\dbfarm\demo" There are no errors. Then I trying to connect to this server: mclient.exe -u monetdb -P secret No errors, connected. Then, I am trying to open new session: mclient.exe -u newuser -P secret2 Ooops! Client exits with error: Connection terminated Server unexpectedly dies. I restarted server, then try connect one more time, same behaviour: "Connection terminated". Ok. Then I connected to server with default "monetdb" user and checked "users" table: mclient.exe -u monetdb -P secret sql>select * from users; +---------+---------------+----------------+ | name | fullname | default_schema | +=========+===============+================+ | monetdb | MonetDB Admin | 2000 | | newuser | null | null | +---------+---------------+----------------+ 2 tuples (5.332ms) Look, fullname and default_schema for "newuser" is null. I think "null pointer dereference" somewhere in code. If I creating user with SQL (CREATE USER ...) everything works fine, I can connect.