Hi,

this is my code:

myControllerExtension is the extension of standard controller opportunity

*****begin****

global class myControllerExtension {

   public Opportunity Opp;
   global String IdNewAvenant;
   global String IdPoliceMere;
   Opportunity opportunity {get;set;}   
   public Opportunity OppAcc {get;set;}
   
/********************************************************************************************/       
   ApexPages.StandardController controller;   
   public myControllerExtension(ApexPages.StandardController c)
   
   {
        this.Opp = (Opportunity) c.getRecord();
               
   OppAcc = [select Accountid, LeadSource,Activit_principale__c, Ancien_num_ro_de_police__c
             from Opportunity where  id = :Opp.id];
       
   }                              
/********************************************************************************************/
   public PageReference Avenant()
      {
        return Page.Avenant;
      }   
/********************************************************************************************/    
     public PageReference cancel()
     {
            PageReference opportunityPage = new ApexPages.StandardController(opp).view();
            opportunityPage.setRedirect(true);
            return opportunityPage;
     }
/********************************************************************************************/     
   public Opportunity getOpportunity() {
      opportunity = new Opportunity();
      return opportunity;
   }
/********************************************************************************************/     
   public PageReference save() {
      
   Opportunity opport = new Opportunity(
                                         LeadSource=OppAcc.LeadSource,
                                         AccountId=OppAcc.AccountId,
                                         Ancien_num_ro_de_police__c=OppAcc.,
                                         Activit_principale__c=OppAcc.Activit_principale__c
                                       );    
             insert opport;
             IdPoliceMere = Opp.id;
             IdNewAvenant=opport.id;
                   
   BatchCreerAvenant acc = new BatchCreerAvenant();
   Database.executeBatch(acc);         
                 
      PageReference opptyPage = new ApexPages.StandardController(opport).view();
      opptyPage.setRedirect(true);
      return opptyPage;    
   }       
}

******end**********

my batch:

*****begin*********

global class BatchCreerAvenant implements Database.Batchable<sObject>{

String IdAvenant;
String IdPolice;

        
global final String query ='SELECT id,name FROM Opportunity';        

global Database.querylocator start(Database.BatchableContext BC){
            return Database.getQueryLocator(query);}

global void execute(Database.BatchableContext BC, List<Sobject> scope){

//recover the variable at this level
IdAvenant = IdNewAvenant;  //Save error: Variable does not exist: IdNewAvenant
IdPolice = IdPoliceMere;  //Save error: Variable does not exist: IdPoliceMere

List<Opportunity> opps = [select id,  Date_d_ech_ance_de_la_police__c, Total_montant_pay__c, varBalance__c , BalanceTest__c
                            from Opportunity where id=:IdNewAvenant];

              
              
 
}
global void finish(Database.BatchableContext BC){
   
}
}

please help me to recover this variabe at my batch.

Thanks.