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I'm looking to add an error message to an Opportunity if a user tries to delete it whilst it has any child contracts.


Currently my trigger code is as follows


trigger ClosedOpportunityPreventDeletion on Opportunity (before delete) {

if (system.Trigger.isDelete){

Opportunity[] Opps = [select id, (select id, Opportunity__c from PCFS__r) from Opportunity where id in :Trigger.oldMap.keySet()];


for (Opportunity o : Opps){


o.adderror('You cannot delete this Opportunity as it has one or more Customer Forms associated with it');




  Unfortunately, if I use this code, I currently get an error saying "caused by: System.Exception: SObject row does not allow errors".


Any ideas?


With thanks 



Message Edited by Big Ears on 07-28-2009 06:54 AM