Action: Ensure that the Oracle server and its TNS listener are both operational. If the protocol is SNA: also check the PGA_LOG_DB, PGA_LOG_USER, and PGA_LOG_PASS parameters in the gateway init file and ensure that they specify the correct database string, userid, and password, respectively. If the protocol is TCP/IP: also check the PGA_TCP_DB, PGA_TCP_USER, and PGA_LOG_PASS parameters in the gateway init file and ensure that they specify the correct database string, userid, and password, respectively. Refer to the Oracle Server Messages and Codes Manual for information on the Oracle server message.