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Prathiba Narayanan 9Prathiba Narayanan 9 

Validation Rule to check on associated case field and status

Need help in creating validation rule, where a case can be closed as duplicate, if the Associated case field is not blank and the associated case status is not equal to closed
VineetKumarVineetKumar
AND(ISBLANK(ParentId), NOT(PRIORVALUE(Status, 'Closed')), ISPICKVAL(Status, 'Closed'))