Oracle Error ORA-55456: no valid rules index for this model-rulebase combination

Oracle Error Message

ORA-55456: no valid rules index for this model-rulebase combination

Reason for the Error

A valid rules index did not exist for specified combination of models and rulebases.

Solution

Create a rules index for the specified models and rulebases combination, or use a combination of models and rulebases for which a rules index exists, and retry the operation. Also ensure that the rules index status matches the status for the rules index specified in the query.