\nE_US0001 error occurs when more users are trying to connect to the DBMS than the maximum number of users allowed (through configuration). The following are the steps to increase the number of allowed connections:\n\n    Check to see how many users/ sessions are connected to the database. The DBMS parameter connect_limit controls that value.\n    Increase 'connect_limit' if user connections are getting more or close to that value. It can be increased using one of the two following methods:\n        Run cbf to start the configuration utility (CBF). Go to DBMS Server (Configure) > connect_limit (Edit)\n\nor\n\n    Run iisetres to change the connect limit parameter to the new value\n\n    iisetres ii.<server_name>.dbms.*.connect_limit new_value\n\n\n    Restart the installation to bring that into effect