ORA-12808: cannot set string_INSTANCES greater

admin

ORA-12808: cannot setstring_INSTANCESgreater than number of instances string
Cause: Anattempt was made to set SCAN_INSTANCES or CACHE_INSTANCES
using the ALTER SYSTEM command to a value larger than the number of
available instances.
Action: Seethe accompanying message for the current allowable maximum value,
or set SCAN_INSTANCES / CACHE_INSTANCES to ALL.