ORA-16884
The specified observer name is invalid.
Cause
A reserved keyword (ALL or NONAME) was specified for the observer name for the START OBSERVER command.
Action
Specify a name other than ALL or NONAME and retry the command.
ORA-16884
The specified observer name is invalid.
Cause
A reserved keyword (ALL or NONAME) was specified for the observer name for the START OBSERVER command.
Action
Specify a name other than ALL or NONAME and retry the command.
ORA-16884
unable to start more than one observer
Cause
More than one observer could not be started because the release of the observer was earlier than 12.2.
Action
Upgrade the Oracle client home to release 12.2 and start the observer using the DGMGRL CLI in that home.
