ORA-25456: rule set was modified or evaluation terminated for iterator: string

Cause : An attempt to get rule hits was made, which failed because the underlying rule set was modified after the iterator was returned.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Try again after re-evaluating the rule set.

update : 24-06-2017
ORA-25456

ORA-25456 - rule set was modified or evaluation terminated for iterator: string
ORA-25456 - rule set was modified or evaluation terminated for iterator: string

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