ORA-12808: cannot set [string]_INSTANCES greater than number of instances [string]

Cause: 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.

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

Error Type: ORA

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