Attribute is Not present

Hello All,

There is a need to update the status of the record in MV when there change in value for location in SQL table, The code is working for the existing user, it fails for the New user with the Error message. Kindly advice.

Microsoft.MetadirectoryServices.AttributeNotPresentException: Attribute "location" is not present.
   at Microsoft.MetadirectoryServices.Impl.AttributeImpl.get_Value()
   at Mms_ManagementAgent_SQLMAExtension1.MAExtensionObject.Microsoft.MetadirectoryServices.IMASynchronization.MapAttributesForImport(String FlowRuleName, CSEntry csentry, MVEntry mventry)

The below is scenario

 NEW - Update mventry["status"].value = "NEW"
 Update - Update mventry["status"].value = "Update"
 No Update - Update mventry["status"].value = "No update receive"

Advance attribute flow is mapped location(Datasource)->location(MV)

The Code is below

case "Status":    

 if ( string.IsNullOrEmpty(mventry["location"].Value)== true)
           {   
                    // New creation

                    mventry["status"].Value = "NEW";

           }
                else
                       {
                                
                          if (csentry["location"].Value == mventry["location"].Value)
                                  {
                                         // NO Update

                                          mventry["status"].Value = "No update receive";

                                    }
                                         else
                                               {
                                                 //Update

                                                   mventry["status"].Value = "Update";                               

                                                    }
                           
                        }

                        break;

Thanks and Regards,
Anirban Singha