Hi all,
I'm trying to insert two new opportunities into the system in Apex based on user input.  The values will be identical on both, apart from the Close Date which will always be different.  However on the insert call, I'm getting the error in the subject.  Does anyone know why I'm getting this and how to get around it?  Why can I not insert more than one opportunity at once, regardless of the fact many of the fields are identical?  Here's the code I'm using to create the opportunity records, note that popOpp is an opportunity record created in Apex, and it's fields are populated in a visualforce page.  I then apply these values to new opportunityrecords and denamically populate the close date:

Date closeDate = fw.Start_Date__c;
for(integer i = 1; i <= numOpps; i++){
    opportunity opp = new Opportunity(
     Name = fw.Name+' - '+monthMap.get(closeDate.Month())+' '+closeDate.Year(),
     CloseDate = CloseDate,
     AccountId = popOpp.AccountId,
     StageName = 'R3 - Qualified Lead',
     Booking_Entity__c = popOpp.Booking_Entity__c,
     Order_to_place__c = popOpp.Order_to_place__c,
     Booking_Site__c = popOpp.Booking_Site__c,
     Budget_quote__c = popOpp.Budget_quote__c,
     Industry__c = popOpp.Industry__c,
     Received_Date__c = popOpp.Received_Date__c,
     End_User_Company_Name__c = popOpp.End_User_Company_Name__c,
     Quote_Required_By_Date__c = popOpp.Quote_Required_By_Date__c,
     Country__c = popOpp.Country__c,
     Date_Quoted__c = popOpp.Date_Quoted__c,
     Terms_Conditions__c = popOpp.Terms_Conditions__c,
     Quoted_Lead_Time__c = popOpp.Quoted_Lead_Time__c,
     CurrencyIsoCode = popOpp.CurrencyIsoCode,
     OwnerId = popOpp.OwnerId
    );
    oppList.add(opp);
    closeDate = closeDate.addMonths(selectedFreq);
   }
  }

...

Database.SaveResult[] oppSrList;
   try{
    oppSrList = Database.insert(oppList);   <--ERROR IS HERE
   }catch(Exception e){
    ApexPages.addMessages(e);
    return;
   }

Thanks