Oracle Error ORA-12808: cannot set string_INSTANCES greater than number of instances string

Oracle Error Message

ORA-12808: cannot set string_INSTANCES greater than number of instances string

Reason for the Error

An attempt was made to set SCAN_INSTANCES or CACHE_INSTANCES using the ALTER SYSTEM command to a value larger than the number of available instances.

Solution

See the accompanying message for the current allowable maximum value, or set SCAN_INSTANCES / CACHE_INSTANCES to ALL.