Hello All,

I have a requirement to display for each Parent ,list of child records and their list of grand parent records in a visualforce page.
Parent and child have lookup relationship .
But Child to Grand Child are not having any relationship but in GrandChild Object i have one text field "Parent Id " in that filed The Child record id is storing.



Apex Class :
 

public  without sharing class Parentchildgrandchild {
    
   
    public string str;
    public list<Contact> Pilist;
    public Map<Contact,list<Grandchild__c>> PIMcamap {get;set;}
    Map<Account,List<Contact>> IPPIMap {get;set;}
                   
    public Parentchildgrandchild(ApexPages.StandardController controller) {
        
        String pcId = ApexPages.currentPage().getParameters().get('id');
        PIMcamap= new Map<Contact,list<Grandchild__c>>();
        
         IPPIMap = new Map<Account,List<Contact>>();
        test__c pc= [select id from test__c where id =:pcId];
		
		for(Account Ip:[select id,name,from Account where test__c =:pcId])
            {   
				for(Contact pi :[SELECT id,name,parent from Contact where Account =:ip.id order by LastModifiedDate ])
                     
                {            
				
					PIList=new List<Contact>();
																					
					list<Grandchild__c> ca= new list<Grandchild__c>();
					str=(string)pi.id;
					ca=[select id, name, parentid from Grandchild__c where parentid=:str];
																					
					PIMcamap.put(pi,ca);
					PIList.add(pi);
                                                                                                
                 }
                                                                                                                
                IPPIMap.put(ip,PIList);   
                                                                                
                   
                
       
			}
    
    public class PIwrapper {
        
        public Account IP {get;set;}
        public Contact pi{get;set;}
        public Grandchild__c mca {get;set;}
       
        
        
    }
    
    
}

VisuaForce Page :
 

<apex:page renderAs="pdf" standardController="MedConnect__Product_Complaint__c" extensions="Parentchildgrandchild">
    
              
                  <apex:repeat value="{!IPPIMap}" var="ac">
                      <table width = "100%" row ="1" column="3" >
                        
					  <tr><th width = "500">Name #</th></tr>
					  <tr><td >{!ac.Name}</td></tr>
					  <tr><th>Child Name</th></tr>
					  
					   <apex:repeat value="{!IPPIMap[ac]}" var="child"> 
							<tr><td>{!child.name}</td></tr>   
							<tr><th>Grand Child Name</th></tr>
							
									<apex:repeat > 
									<tr><td>{!child.name.name}</td></tr>   
									
									</apex:repeat>
						  
						</apex:repeat>
                      
                  
                  </table>
                </apex:repeat>
                    
   
</apex:page>

Due to not having any relationship between Child and GrandChild ,i have created a Wrapper class for that and store thevalues.

From the Apex Class im able to store values of 
Parent and List of Child Records into the map ==> IPPIMap and 
Child record and list of  GrandChild Records ==>PIMcamap

But while referencing in the visualforce page im getting the  below error 

Unknown property 'ParentchildgrandchildStandardController.IPPIMap'

Could you please check and help me on this request .