Message Oracle PGA-20947 - unable to bind variable string for transaction logging

ERRORunable to bind variable string for transaction logging
CAUSEThe gateway server was unable to bind variable for use in performing transaction logging functions. An Oracle server message will follow this message.
ACTIONEnsure that the Oracle server and its TNS listener are both operational. 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. Refer to the Oracle Server Messages and Codes Manual for information on the Oracle server message.