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raju p 4raju p 4 

rollupsummsry isuse

trigger Agregate on Student__c(after insert,after Delete,after undelete) {
       list<id> ids= new list<id>();
        if(trigger.isinsert ||  trigger.isUndelete){
               for(Student__c s:trigger.old){
            list<Course__c> x= new  list<Course__c>();
       // list<Course__c> cors=[select NUmberOf_Student__c,(select Course__c from Students__r)from Course__c  where id=:ids];
      list<course__c> cors=[select name, NUmberOf_Student__c,(select id,Course__c from Students__r)from course__c where id in:ids ];
         //   x.add(cors);
       /*    try{

               update x;
               Catch(Exception e){
        System.debug('Exception :'+e.getMessage());
i am geeting veraiable doesnot exist ie>.Students__r
Vivian Charlie 1208Vivian Charlie 1208

Hi Raju,


I believe we are already on this issue at the below link


If YES, once that is resolved please feel free to mark this issue as closed.