Hi Shashi, 

Sorry for the delayed response here is the email that is generated, we need to add the field Event.rC_Event__End_Date_Time__c_Date_Time__c next to Session End Date:



I updated the apex class to read like this:


public class ConsolidatedEmailCtrl {

public ConsolidatedEmailCtrl(){

}


public void sendEmail(){

Set<Id> SetofCampaigns = new Set<Id>();


Map<String,list<String>> MapOfCamMemEventAndSessions = new Map<String,list<String>>();
Map<String,String> MapOfLeadOrContactIdAndEmailAddress = new Map<String,String>();
Map<String,String> MapOfCampaignMember = new Map<String,String>();
list<CampaignMember> LstOfCampaignMembers = new list<CampaignMember>();

list<Messaging.SingleEmailMessage> LstOfEmailsToBeSent = new list<Messaging.SingleEmailMessage>();

//Member must be registered for event and event session to recieve email.
for(CampaignMember camMem : [select id,campaignId,Campaign.ParentId,Lead_Contact_email__c,Lead_Contact_ID__c,Name from 
                             campaignmember where Needs_to_send_email__c = true AND campaign.RecordType.DeveloperName='Event_Session'
                             AND campaign.parent.RecordType.DeveloperName = 'Event' AND Lead_Contact_email__c!=null 
                             AND rC_Event__Registered_Status__c = 'Registered' order by campaign.rC_Event__Start_Date_Time__c asc])
{
    
    if(MapOfCamMemEventAndSessions.containskey(camMem.Lead_Contact_ID__c+'|'+camMem.Campaign.ParentId))
    {
        MapOfCamMemEventAndSessions.get(camMem.Lead_Contact_ID__c+'|'+camMem.Campaign.ParentId).add(camMem.campaignId);
    }
    else
    {
        MapOfCamMemEventAndSessions.put(camMem.Lead_Contact_ID__c+'|'+camMem.Campaign.ParentId,new list<String>{camMem.campaignId});
    }
         
    //Adding CampaignsId in Set
     SetofCampaigns.add(camMem.CampaignId);
     SetofCampaigns.add(camMem.Campaign.parentId);  
     
     //Setting Map of Lead or Contact ID with their email address
     MapOfLeadOrContactIdAndEmailAddress.put(camMem.Lead_Contact_ID__c,camMem.Lead_Contact_email__c);
     
     //Setting Map of Campaign Member
     MapOfCampaignMember.put(camMem.Lead_Contact_ID__c,camMem.Name);
     
     //Adding campaign members in list for update after processing
     camMem.Needs_to_send_email__c = false;
     LstOfCampaignMembers.add(camMem);
}

Map<Id,Campaign> MapOfCampaign = new Map<Id,Campaign>([select id,name,rC_Giving__Affiliation__c,Header__c,Footer__c,
                                                       rC_Event__Start_Date_Time__c,Type__C from Campaign where Id IN: SetOfCampaigns]);

//Query custom setting to get URL of Images
Map<String,String> MapOfLOGONameAndURL = new Map<String,String>();
for(Consolidatedemail__c cs : [select name,LOGO_URL__c from Consolidatedemail__c])
{
    MapOfLOGONameAndURL.put(cs.name,cs.LOGO_URL__c);
}

//Query custom setting to get email Body template
Map<String,String> MapOfConsolidatedBody = new Map<String,String>();
for(Consolidated_body__c cb : [select name,Body_Template__c from Consolidated_body__c])
{
    MapOfConsolidatedBody.put(cb.name,cb.Body_Template__c );
}

//start body: Filling Map of Campaign and Campaign Venue             
Map<String,List<String>> MapOfCamAndCamVen = new Map<String,List<String>>();
  for(rC_Event__Campaign_Venue__c camVen : [select id,name,rC_Event__Campaign__r.rC_Event__Start_Date_Time__c,rC_Event__Campaign__r.rC_Event__End_Date_Time__c,rC_Event__Campaign__c,
                                            rC_Event__Venue_Name__c from rC_Event__Campaign_Venue__c where rC_Event__Campaign__c IN: SetofCampaigns])
  {
     if(MapOfCamAndCamVen.containskey(camVen.rC_Event__Campaign__c))           
     MapOfCamAndCamVen.get(camVen.rC_Event__Campaign__c).add(camVen.rC_Event__Venue_Name__c );
     else
     MapOfCamAndCamVen.put(camVen.rC_Event__Campaign__c,new list<String>{camVen.rC_Event__Venue_Name__c });
  }
//End body: Filling Map of Campaign and Campaign Venue 



for(String str : MapOfCamMemEventAndSessions.keyset())
{
//apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'str '+str ));
//Parse Event Id
String EventId = str.substring(str.indexof('|')+1,str.length());
String ContactLeadId = str.substring(0,str.indexof('|'));
STring ContactleadEmailAddress = MapOfLeadOrContactIdAndEmailAddress.get(ContactLeadId);


String emailBody = '<html> <body>  <img src="';
emailBody += MapOfLOGONameAndURL.get(MapOfCampaign.get(EventId).rC_Giving__Affiliation__c) + ' ';
emailBody += '"></img></body> </html>';

//Start Body of Header
String EmailHeader = MapOfCampaign.get(EventId).Header__c;
//apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'EmailHeader '+EmailHeader ));
if(EmailHeader !=null && EmailHeader  !='')
{
    //code for parsing Header
    emailBody += EmailHeader;
    if(emailBody.contains('&lt;&lt;CampaignMember.FirstName&gt;&gt;'))
    {
        emailBody = emailBody.replaceAll('&lt;&lt;CampaignMember.FirstName&gt;&gt;','<b>'+MapOfCampaignMember.get(ContactLeadId)+'</b>' );
    }
    
    if(emailBody.contains('&lt;&lt;Event.Name&gt;&gt;'))
    {
        emailBody = emailBody.replaceAll('&lt;&lt;Event.Name&gt;&gt;','<b>'+MapOfCampaign.get(EventId).Name+'</b>' );
    }
    
    if(emailBody.contains('&lt;&lt;Event.rC_Event__Start_Date_Time__c&gt;&gt;'))
    {
        String StartDateTime = (MapOfCampaign.get(EventId).rC_Event__Start_Date_Time__c!=null) ? (MapOfCampaign.get(EventId).rC_Event__Start_Date_Time__c).format():' ';
        emailBody = emailBody.replaceAll('&lt;&lt;Event.rC_Event__Start_Date_Time__c&gt;&gt;','<b>'+StartDateTime+'</b>');
    } 
if(emailBody.contains('&lt;&lt;Event.rC_Event__End_Date_Time__c&gt;&gt;'))
    {
        String EndDateTime = (MapOfCampaign.get(EventId).rC_Event__End_Date_Time__c!) ? (MapOfCampaign.get(EventId).rC_Event__End_Date_Time__c).format():' ';
        emailBody = emailBody.replaceAll('&lt;&lt;Event.rC_Event__End_Date_Time__c_Date_Time__c&gt;&gt;','<b>'+EndDateTime+'</b>');
    }   
}
//End Body of Header
//apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'Sessions of campaign'+MapOfCamMemEventAndSessions.get(str) ));
//Start of Body // it must be session
for(String sessionId: MapOfCamMemEventAndSessions.get(str))
{
    String TypeOfBody = MapOfCampaign.get(EventId).Type__c;
     //apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'TypeOfBody '+TypeOfBody+'---'+sessionId ));
    
    if(TypeOfBody!=null && TypeOfBody!='')
    {
        String EmailBodyText = MapOfConsolidatedBody.get(MapOfCampaign.get(EventId).Type__c);
       // apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'EmailBodyText '+EmailBodyText ));
       
        emailBody += '<br/><br/>'+EmailBodyText;
        if(emailBody.contains('<<Session.Name>>'))
        {
            emailBody = emailBody.replaceAll('<<Session.Name>>','<b>'+MapOfCampaign.get(sessionId).Name+'</b><br/>' );
        }       
        if(emailBody.contains('<<Session.rC_Event__Start_Date_Time__c>>'))
        {
            String StartDateTime = (MapOfCampaign.get(sessionId).rC_Event__Start_Date_Time__c!=null) ? (MapOfCampaign.get(sessionId).rC_Event__Start_Date_Time__c).format():' ';
            emailBody = emailBody.replaceAll('<<Session.rC_Event__Start_Date_Time__c>>','<b>'+StartDateTime +'</b><br/>' );
        } 
         if(emailBody.contains('<<Session.rC_Event__End_Date_Time__c>>'))
        {
            String EndDateTime = (MapOfCampaign.get(sessionId).rC_Event__End_Date_Time__c!=null) ? (MapOfCampaign.get(sessionId).rC_Event__End_Date_Time__c).format():' ';
            emailBody = emailBody.replaceAll('<<Session.rC_Event__End_Date_Time__c>>','<b>'+EndDateTime +'</b><br/>' );
        } 
        
        if(emailBody.contains('<<Session.Venue>>'))
        {
            emailBody = emailBody.replaceAll('<<Session.Venue>>', MapOfCamAndCamVen.get(sessionId)!=null? '<b>'+MapOfCamAndCamVen.get(sessionId)+'</b>': '<b>None</b>' );
        }                     
    
    }

}

//Start Body of Footer
String EmailFooter = MapOfCampaign.get(EventId).Footer__c;
//apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'EmailFooter '+EmailFooter ));
if(EmailFooter !=null && EmailFooter !='')
{
    //code for parsing Header
    emailBody += '<br/><br/>'+EmailFooter;
    
}





//End of Body

// org wide email address
list<OrgWideEmailAddress> owea = new list<OrgWideEmailAddress>();
if(!test.isrunningtest())
{
    owea = [select Id from OrgWideEmailAddress where Address = 'events@ounceofprevention.org'];
}
//preparing list of email messages to be send
    
    Messaging.SingleEmailMessage emailToSend = new Messaging.SingleEmailMessage();
    emailToSend.setHtmlBody(emailBody );
    emailToSend.setSubject('Thank you for Registering!');
    emailToSend.setToAddresses(new List<String>{ContactleadEmailAddress});
    if(owea.size() > 0) {
        emailTosend.setOrgWideEmailAddressId(owea.get(0).Id);
    }
        
    LstOfEmailsToBeSent.add(emailToSend);    
}
    if(LstOfEmailsToBeSent.size()>0)
    {        
        //send email    
        Messaging.sendEmail(LstOfEmailsToBeSent);     
        update LstOfCampaignMembers;
       // apexpages.addmessage(new apexpages.message(apexpages.severity.confirm,'email sent'));   
    }




}



}

but when I attempt to deploy the change into our production account i get the following errors: