Hi All,

After update trigger on the opportunity Object.

If the Title__c field on the Opportunity object have CEO as the title  then I should be able to update countofCEO field on the Account object
So when a user update the title__ field from CEO to Blank then counter on the Account object should decrease by 1 and vice versa

When I Update from CEO to Blank ,code run's fine but when I update same record and change Title field from blank to CEO then I get  null pointer Exception and am not sure how to remove it.

Exception as per Salesforce.

CountOfOppwithCEOTitle: execution of AfterUpdate caused by: System.NullPointerException: Attempt to de-reference a null object Trigger.CountOfOppwithCEOTitle: line 77, column 1


Below given line is the culprit.

As per the debug logs ,Below given line is an issue
if(Trigger.oldmap.get(opp.id).title__c.contains('CEO')


      if(Trigger.oldmap.get(opp.id).title__c.contains('CEO')&& opp.title__c==null)



if(trigger.isUpdate&& trigger.IsAfter)
  {
   Set<id>Accids=new set<id>();
   Map<id,opportunity>mapofOppIdtoOppRecords=new map<id,opportunity>();
   for(opportunity opp:trigger.new)
   {
       
       if(Trigger.oldmap.get(opp.id).title__c.contains('CEO')&& opp.title__c==null)
              
       //if(trigger.newmap.get(opp.id).title__c!=trigger.oldmap.get(opp.Id).title__c && (Trigger.oldmap.get(opp.id).title__c.contains('CEO')&& opp.title__c==null))
       {
                 
           system.debug('I am in the initial for loop');
           mapofOppIdtoOppRecords.put(opp.id,opp);
           Accids.add(opp.accountid);
                  
    }
       else
         if(opp.title__c!=trigger.oldmap.get(opp.Id).title__c && (String.isBlank(Trigger.oldmap.get(opp.id).title__c)&& opp.title__c.contains('CEO')))
               {
     
                
            mapofOppIdtoOppRecords.put(opp.id,opp);
            Accids.add(opp.accountid);
            
                
                
                
               }
   
   }

Map<id,Account>MapofAccountIdToAccount=new map<id,account>([select id,countofCEO__c from account where id in:Accids]);    
List<opportunity>Opp=[Select id,title__c,Accountid from Opportunity where id in:mapofOppIdtoOppRecords.keyset()];
list<account>acclist=new list<account>();  
for(Opportunity Opprecords:opp)
{
  system.debug('I am in for loop');
if(MapofAccountIdToAccount.containskey(opprecords.accountid)&& Opprecords.title__c==null)
  {
      
        system.debug('The debug value is');
   
        Account Acc=MapofAccountIdToAccount.get(Opprecords.Accountid);
        Acc.countofCEO__c=acc.countofCEO__c-1;
        acclist.add(acc);
      
      
 }
else
   
  if(MapofAccountIdToAccount.containskey(opprecords.accountid)&& Opprecords.title__c.contains('CEO'))
        {
        Account Acc=MapofAccountIdToAccount.get(Opprecords.Accountid);
        Acc.countofCEO__c=acc.countofCEO__c+1;
        acclist.add(acc);
      
            
            
            
        }
        
}
    try
    {
        
        if(!acclist.isEmpty()&& acclist.size()>0)
        {
            
            Map<id,Account>MapofAccountIdToOpp=new map<id,account>();
            MapofAccountIdToOpp.putall(acclist);
            update MapofAccountIdToOpp.values();
        }
    }
    catch(DmlException de)
    {
        
    }
    
    
}



Thanks