Team, 

I have created a button that will allow you to add attachments from the notes and attachments section before sending out an email. Code coverage is 95% in sandbox but am getting the below errors in production. 

Getting the below erros when running my test class in production: 
Can someone please take a look and see what I am doing wrong?

Apex Class: 

public with sharing class OpenEscrowBttn {
    public Id targetId {get;set;}
    public String AdditionalEmailId { get;set;}
    public String[] selDocs = new String[]{};   
    //public Transient List<Attachment> optyDocs {get;set;} 
    Id TempFolderId;
    Id  TempTemplateId;
    String TemplateName;
    public Transient Attachment[] oldAttachments;
    public Integer attSize {get;set;}
    public List<DocItem> OpptyDocs {get;set;}    

    public OpenEscrowBttn(ApexPages.StandardController controller) {      
        Id optyId = ApexPages.currentPage().getParameters().get('optyId');
        Id acctId = ApexPages.currentPage().getParameters().get('acctId');
        if (optyId != Null) {
            targetId = optyId;
            List<Opportunity>  oppObj = [SELECT Id, AccountId, Name FROM Opportunity where Id = :optyId ];
            System.debug('******oppObj******'+oppObj);
            if(oppObj.size() > 0)
            {
               List<Account> accObj =[SELECT Id, AnnualRevenue, Appointment_Changes__c, AdditionalEmails__c FROM Account where Id = :oppObj[0].AccountId];
                System.debug('******accObj ******'+accObj );
                if(accObj.size()> 0)
                {
                  if(accObj[0].AdditionalEmails__c != null)
                  {
                    AdditionalEmailId = accObj[0].AdditionalEmails__c;
                  }
                }
            }
        } else if (acctId != Null){
          targetId = acctId;
          List<Account> accObj =[SELECT Id, AnnualRevenue, Appointment_Changes__c, AdditionalEmails__c FROM Account where Id = :acctId ];
          System.debug('******accObj ******'+accObj );
          if(accObj.size()> 0)
           {
             if(accObj[0].AdditionalEmails__c != null)
               {
                    AdditionalEmailId = accObj[0].AdditionalEmails__c;
               }
           }
          
        } else {
            targetId = Null;
        }
  
        system.debug('\n\n targetId = '+targetId);
    
        attSize = 0;
        //optyDocs = new List<Attachment>();
    set<Id> RelatedContracts = new  set<Id>();        
        if ( acctId != Null) {          
          for (Contract ct : [select id from Contract where accountId =:acctId]) {
            RelatedContracts.add(ct.id);
          }
        } 
          
        if (targetId != null) {
            OpptyDocs = new List<DocItem>();
            for (Attachment at : [Select id, Name, Body, ParentId from Attachment where (ParentId = :targetId OR ParentId in :RelatedContracts)]) {                   
                //optyDocs.add(at);
                OpptyDocs.add(new DocItem(at.Id,false,at.Name)); 
                attSize++;
            } 
            //attSize = optyDocs.size();
            if (attSize <= 0) {             
                //ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.FATAL, 'No attachments found!'));
                ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Error,'No attachments found for this opportunity!'));
            }          
        }           
    }

    public PageReference doEditEmail(){

        Folder TFolderId = [Select id from Folder where DeveloperName = 'Ward_Residential_Workflow_Templates' limit 1];      
        TempFolderId = TFolderId.Id;
                    
        TemplateName = 'Ke Kilohana Open Escrow Email';      
        EmailTemplate[] Temp = [Select id from EmailTemplate where Name = :TemplateName and FolderId = :TempFolderId limit 1];
                    
        if ( Temp.size() > 0 ) {
            TempTemplateId = Temp[0].id;
/*
        } else {
            EmailTemplate[] Temp1 = [Select id from EmailTemplate where FolderId = :TempFolderId limit 1];
            if ( Temp1.size() > 0 ) {
                TempTemplateId = Temp1[0].id;
            }
*/                       
        }       
        
        //Delete All current Attachments
        oldAttachments = [select id from Attachment where ParentId = :TempTemplateId ];
        
        if ( oldAttachments.size() > 0 ) {    
            delete oldAttachments;
        }        

        EmailTemplate t = [Select id, FolderId, TemplateType, HtmlValue, subject, body from EmailTemplate where Id  = :TempTemplateid];
        
        List<Attachment> nTlist =new  list<Attachment>();
        //Id attId = selDocs[0];
        
        set<id> aList= new set<id>();
        for (DocItem d: OpptyDocs) {
            system.debug('lCheck:'+d.lcheck);
          if ( d.lcheck ) {
            aList.add(d.DocId);
            //numDoc++;
          }
        }
        
        if (aList.size() == 0) {
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Error,'No attachments selected!'));
            return null;
        } else {
                        
            Attachment tnew;
                    
            Attachment[] tList = [Select Name, Body, ParentId from Attachment where id IN :aList];
            
            for (Attachment o: tList) {
                tnew = new Attachment();
                //tnew.Name = '(From Attachments)-'+o.name;
                tnew.Name = o.name;
                tnew.Body = o.Body;
                tnew.ParentId = t.id;
                system.debug ('\n\n parent '+t.id );
                nTlist.add(tnew);           
            }       
            
            insert nTlist;
            
            /*
            set<id> sTlist = new set<id>();
            
            for (Attachment n: nTlist) {
              sTlist.add(n.id);
            }          
            */
            
            //PageReference pg = new PageReference('/_ui/core/email/author/EmailAuthor?id=' + attId + '&retURL=%2F' + targetId + '&p3_lkid=' + targetId + '&p2_lkid=&template_id='+t.id+'&new_template=1'); 
            //PageReference pg = new PageReference('/_ui/core/email/author/EmailAuthor?retURL=%2F' + targetId + '&p3_lkid=' + targetId + '&rtype=003' + '&p2_lkid=&template_id='+t.id+'&new_template=1');
            PageReference pg;
            if(AdditionalEmailId != null)
            {
              pg = new PageReference('/_ui/core/email/author/EmailAuthor?retURL=%2F' + targetId + '&p3_lkid=' + targetId +'&p24=' +AdditionalEmailId+'&rtype=003' + '&p2_lkid=003i000003hY6XKAA0' + '&p2_lkid=&template_id='+t.id+ '&p4=dmoreira@tghawaii.com,jnelson@tghawaii.com,abastatas@tghawaii.com' +'&new_template=1');
            } 
            
            else 
            {
              pg = new PageReference('/_ui/core/email/author/EmailAuthor?retURL=%2F' + targetId + '&p3_lkid=' + targetId + '&rtype=003' + '&p2_lkid=&template_id='+t.id+'&new_template=1');
            } 
              
            
            pg.setRedirect(true);
            return pg;
        }       
    }
        
    public PageReference doCancel(){
        PageReference pg = new PageReference('/'+targetId); 
        pg.setRedirect(true);
        return pg;
    }  
    
    public class DocItem  {    // Referral Request Wrapper
        public id DocId {get; set;}
        public boolean lcheck {get; set;}
        public string DocName {get; set;} 
         
           
        public DocItem (id i, boolean c, string s)
            {
                DocId = i;
                lcheck = c;  
                DocName =s; 
            }
    }
      
}

VF Page: 
 

<apex:page id="thePage" standardController="Opportunity" extensions="OpenEscrowBttn" tabStyle="Opportunity">
    <apex:messages style="color:red; font-weight:bold; text-align:center;" />
    <apex:form id="theForm">  
        <apex:pageBlock id="PB" title="Send Email">
            <apex:pageBlockButtons >
                <apex:commandButton value="Edit Email and Send" action="{!doEditEmail}" rendered="{!IF(attSize>0, true, false)}"/>                     
                <apex:commandButton value="Cancel" action="{!doCancel}" immediate="true"/>            
            </apex:pageBlockButtons>        
            <apex:pageblockSection id="PBS1" title="Select Attachments" columns="1">
                  <apex:pageBlockTable value="{!OpptyDocs}" var="s"  >
                        <apex:column width="10%">
                             <apex:facet name="header">Select</apex:facet>
                             <apex:inputcheckbox value="{!s.lcheck}"/> 
                        </apex:column>
                        <apex:column width="30%"> 
                            <apex:facet name="header">Attachments</apex:facet>
                            {!s.DocName}
                        </apex:column>
                  </apex:pageBlockTable>                           
            </apex:pageblockSection>
        </apex:pageBlock>
    </apex:form>
</apex:page>

Test Class: 
 

@isTest
public with sharing class TestOpenEscrowBttn {
  public static testMethod void TestOpenEscrowBttn(){
    Schema.DescribeSObjectResult acctSchema = Schema.SObjectType.Account; 
    Map<String,Schema.RecordTypeInfo> AccountRecordTypeInfo = acctSchema.getRecordTypeInfosByName(); 
    Id acctRTId = AccountRecordTypeInfo.get('Ward Residential Buyers').getRecordTypeId();
    
    Schema.DescribeSObjectResult propSchema = Schema.SObjectType.Property__c; 
    Map<String,Schema.RecordTypeInfo> PropertyRecordTypeInfo = propSchema.getRecordTypeInfosByName();     
    Id propRTId = PropertyRecordTypeInfo.get('Ward Residential').getRecordTypeId();
    
    Schema.DescribeSObjectResult spaceSchema = Schema.SObjectType.Space__c; 
    Map<String,Schema.RecordTypeInfo> SpaceRecordTypeInfo = spaceSchema.getRecordTypeInfosByName();     
    Id spaceRTId = SpaceRecordTypeInfo.get('Ward Residential').getRecordTypeId();

    
    Property__c prop = new Property__c(recordtypeid=propRTId, Name='Test Property');
    insert prop;

    Space__c spaces = new Space__c(recordtypeid=spaceRTId, Name='Test Ward Residential', property__c = prop.id);
    insert spaces;
    
    Profile p = [SELECT Id FROM Profile WHERE Name='System Administrator']; 
    User thisUser = new User(Alias = 'tCook', Email='tatianaCooke@testorg.com', EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US', LocaleSidKey='en_US', ProfileId = p.Id, TimeZoneSidKey='America/Los_Angeles', UserName='tCooke91@testorg.com'); //Changed

    RecordType personAccountRecordType = [SELECT Id FROM RecordType WHERE Name = 'Ward Residential Buyers' and SObjectType = 'Account']; 

    System.runAs ( thisUser ) { 
   WE_Process__c obj=new WE_Process__c();
   obj.Name='test';
   insert obj; 

   Account acc = new Account(); 
   acc.FirstName='John'; 
   acc.LastName='DoeTest1'; 
   acc.PersonEmail = 'doetest1@test.com';
   acc.RecordTypeId = personAccountRecordType.Id; //Changed
   insert acc; 

    Opportunity optyId = new Opportunity();
    optyId.Name = 'optyId';
    optyId.AccountId = acc.Id;
    optyId.Unit_Number__c  = spaces.id;
    optyId.Financing_Type__c = 'Cash Buyer';
    optyId.Purchaser_Type__c  = 'Person(s)';
    optyId.CloseDate = System.today();
    optyId.StageName ='S1: Ready to Contract';
    optyId.Reason_for_Purchase__c ='Primary Residence';
    optyId.Nature_of_Tenancy__c ='Severalty';
    optyId.Sale_Type__c  ='Founder';

    INSERT optyId;
    
    ApexPages.currentPage().getParameters().put('optyId', optyid.id);                
    ApexPages.StandardController sc = new ApexPages.StandardController(optyId);
    OpenEscrowBttn ctrl = new OpenEscrowBttn(sc);
    
    ctrl.doEditEmail();
    
    ctrl.doCancel();
    
    Opportunity optyId1 = new Opportunity(Name='optyId', AccountId=acc.Id, Unit_Number__c=spaces.Id, Financing_Type__c='Cash Buyer', Purchaser_Type__c='Person(s)', Reason_for_Purchase__c='Primary Residence', Nature_of_Tenancy__c='Joint Tenants', Sale_Type__c='Direct', CloseDate=date.today()+10, StageName='S1: Ready to Contract');
    insert optyId1;    
    
        Attachment attach=new Attachment();     
      attach.Name='Software Eval.txt';
      Blob bodyBlob=Blob.valueOf('Software Eval');
      attach.body=bodyBlob;
        attach.parentId=optyId.id;
        insert attach;    
        
    ApexPages.currentPage().getParameters().put('optyId', optyId.id);
    ApexPages.StandardController sc1 = new ApexPages.StandardController(optyId);    
    OpenEscrowBttn ctrl1 = new OpenEscrowBttn(sc1);
    
    System.debug('***attSize: '+ctrl1.attSize);
    System.debug('***optyDocsSize: '+ctrl1.opptyDocs.size());
    ctrl1.OpptyDocs[0].lCheck = true;
    
    ctrl1.doEditEmail();
    
    ApexPages.currentPage().getParameters().put('optyId', null);                
    ApexPages.currentPage().getParameters().put('acctId', null);                
    ApexPages.StandardController sc2 = new ApexPages.StandardController(acc);
    OpenEscrowBttn ctrl2 = new OpenEscrowBttn(sc2);
        
    //ctrl2.doEditEmail();
    
    ctrl2.doCancel();

    ApexPages.currentPage().getParameters().put('optyId', null);                
    ApexPages.currentPage().getParameters().put('acctId', acc.Id);                
    ApexPages.StandardController sc3 = new ApexPages.StandardController(acc);
    OpenEscrowBttn ctrl3 = new OpenEscrowBttn(sc3);
        
    ctrl3.doEditEmail();
    
        
  }
}
}