Panic 46 .. problem with Code given

I am writing an application which uses the 3rd Party APIs
(Mobinfo ) for collecting the network related data ..

But it throughs Panic 46 on devices when i call the following Function ..


   TRequestStatus stat = TRequestStatus(10);
                TBuf<15> num;
      
   //   SetActive();
      
                   minfo->GetIMSI(num,stat); 

/* *** at this point it goes throughs panic 46  ... I am not able to understand why it thoughs panic ... is there any other way to pass parameters ***/
         
          //  User::WaitForRequest();
    // User::LeaveIfError();int safety = 0;
   
                   int counter =0;
   Ã‚    while(counter < 500000)
   Ã‚       {
         Ã‚   
   Ã‚            counter++;
   Ã‚           iEikonEnv->InfoMsg(R_MOBITEST_TEXT_ITEM1);
            if (stat.Int() != KRequestPending)
            iEikonEnv->InfoMsg(R_MOBITEST_TEXT_ITEM0);
            counter = 600000;
         
            
         }
      
   //   wait
      minfo->CancelGetIMSI();
   //   minfo->GetOwnNumber(ownno,stat);