I am trying to do a validation rule to prevent anyone blanking out a field. Its a picklist ad I want to check the field had somethign in it but nw is blank...
AND(
ISPICKVAL(ISCHANGED(Name_of_Regulator__c),
ISPICKVAL(PRIORVALUE(Name_of_Regulator__c) <> ""),
ISPICKVAL(Name_of_Regulator__c), ""))
not enough parameters apparently
