Hi all,

I am trying to pass a parameter from one Visualforce to another.

I need to display / filter opportunities to an Account I gave in the first visualforce.

Here is the part where I declare the "passing" of the AccountId to the second visualforce:
 

public PageReference GoTo_VRWithOptys (){
        string value = 'accountId';
        string url;
        url = '/apex/Visit_Report_with_Opportunities?param1=' + accountId; 

        PageReference pageRef = new PageReference(url);
        pageRef.setRedirect(true);
        return pageRef;
        
    }

In my second Visualforce "Visit_Report_with_Opportunities" I am referencing that parameter in order to show only the opportunities to that account:
 

<apex:pageBlock id="pagination" title="Opportunity Details">
         <apex:pageBlockTable value="{!param1}" var="o" >
            <apex:column value="{!o.Name}"/>
            <apex:column value="{!o.CloseDate}"/>
             <apex:column value="{!o.Amount}"/>
            <apex:column value="{!o.CloseDate}"/>
         </apex:pageBlockTable>

The apex to the second Visualforce page looks like this:
 

public String optyquery;
	public String name {get;set;}
	public Date closedate {get;set;} 
    public Boolean fetchCalled {get;set;} 
    public integer totalRecs {get;set;}
    private integer index = 0;
    private integer blockSize = 5; 
    Id param1 {get;set;}
    String param_value {get;set;}
    
  
    public PaginationWithFilter()
    {
        param_value = System.CurrentPageReference().GetParameters().get('param1');
        totalRecs = [select count() from Opportunity where Days_since_created__c <=365 and Account.Id =: param1];       
        fetchCalled = false;
        
    } 
  
    public void fetch()
    {         
       
        optyquery = 'SELECT Name, CloseDate FROM Opportunity where Days_since_created__c <=365 and Account.Id =: param1 ';
        
        List<Opportunity> tempopty = Database.Query(optyquery);
        totalRecs = tempopty.size();  
       
        optyquery += ' LIMIT ' + blockSize + ' OFFSET ' + index; 
       
        fetchCalled = true;                        
    }       
   
    public List<Opportunity> getOpty()
    {      
        List<Opportunity> optys;
        if(fetchCalled)
        {
            fetch();
        }  
        else
        {
            optyquery = 'SELECT Name, CloseDate FROM Opportunity where Days_since_created__c <=365 and Account.Id =: param1 LIMIT : blockSize OFFSET : index';
        }          
        optys = Database.Query(optyquery);       
        System.debug('Values are ' + optys);
        return optys;       
    }

When I try to save the second visualforce, the error I get is:
 

Error: Unknown property 'param1' referenced in Visit_Report_with_Opportunities

I also tried replacing "param1" by "accountId" but the error then says:

Error: Unknown property 'accountId' referenced in Visit_Report_with_Opportunities

Is there here something missing?