I am having an issue with my code that I should not get. I definitely have more than 10,000 opportunities/accounts in production but my code should only be updating the opportunities related to the account of the event I am inserting. I am getting this error when trying to insert the event on an account with less than 20 related opportunities. Any help is appreciated thanks.

Apex Trigger:

trigger EventTrigger on Event (before insert, before update) {
        list<Event> CSTIMPList = new list<Event>();
        for(Event evnt : trigger.new){
            if(evnt.Implementation_App_Type__c != null && evnt.System_Admin_Over_Ride__c != 'Mark Complete App Date'){
                if(evnt.Implementation_App_Type__c == 'CST'){
        if(CSTIMPList.size() > 0 && CSTIMPList != null){

Apex Class:

public class Event_HDL {
    public static void updateimpdateCST(Event[] evnts){
            List<Opportunity> OppList = new list<Opportunity>();
            List<Account> relatedacclist = new list<Account>();
            //map the Opportunity record
            Map<Id, List<Event>> oppIds = new Map<Id, List<Event>>{}; 
            for(Event evnt : evnts){
                oppIds.put(evnt.WhatId, new list<Event>());
            //map the account
            Map<Id, List<Opportunity>>  soaIds= new Map<Id, List<Opportunity>>{};
            Map<Id, List<Opportunity>>  accIds= new Map<Id, List<Opportunity>>{};
            for(Opportunity opp : [Select Id, AccountId, Implementation_Appointment_Date__c,
                                   Account.Regarding_Review_FP__c, Account.Regarding_Review_Super__c, Account.Regarding_Review_ROA__c from Opportunity where Id in: oppIds.keySet()]){
                soaIds.put(opp.Account.Regarding_Review_FP__c, new list<Opportunity>());
                soaIds.put(opp.Account.Regarding_Review_Super__c, new list<Opportunity>());
                soaIds.put(opp.Account.Regarding_Review_ROA__c, new list<Opportunity>());
                accIds.put(opp.AccountId, new list<Opportunity>());
            //update the related account with the new imp app date
            for(Account acc : [Select Id from Account where Id in: accIds.keySet()]){
                for(Event evnt : evnts){
                    acc.CST_Implementation_Appointment_Date__c = evnt.StartDateTime;
            if(relatedacclist.size() > 0 && relatedacclist != null ){
                update relatedacclist;
            //update all cst soas and recommendations(only from the latest review) off the back of them with the new imp app date
            for(Opportunity opp : [Select Id from Opportunity where Related_SOA__c in: soaIds.keySet() OR Id in: soaIds.keySet()]){
                for(Event evnt : evnts){
                    opp.Implementation_Appointment_Date__c = evnt.StartDateTime; 
                    opp.Trust_Deed_Date__c = evnt.StartDateTime;
                    opp.Trust_Deed_Appointment_Date__c = evnt.StartDateTime;

            //update the opportunities
            if(OppList.size() > 0 && OppList != null){
                update OppList;
  • on which line you are getting this issue? update OppList; or update relatedacclist; ? Jul 7 '16 at 4:18
  • can you confirm if this trigger doesn't fire another trigger (Account and opportunity)? i guess which is causing error
    – Ratan Paul
    Jul 7 '16 at 4:20
  • look in your debug log and see if each soql is returning the # of records you expect
    – cropredy
    Jul 7 '16 at 5:00

The option I will suggest you is to use Batch Class. This will solve your problem once and for any number of records.

Create a batch class that will take input as List of SObjects and update it there.

Use Iterable<sObject> to provide values to execute method instead of Database.QueryLocator.

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