Answer / guest

Cause: The ACTIVE_INSTANCE_COUNT parameter must be set to 1
in a two node cluster database configuration or unspecified
if a secondary instance is not needed.

Action: Check your initialization parameter files and
correct the value of the ACTIVE_INSTANCE_COUNT parameter. If
you are configuring a two node primary/secondary cluster
database, set this value to 1. Otherwise, do not specify any
value for the parameter.

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