Zxing API CODE_39 throwing Java.lang.ArrayIndexOutOfBoundsException: -1

Question

I am using package com.google.zxing to create a barcode with type CODE_39 and is throwing Java.lang.ArrayIndexOutOfBoundsException: -1.I am able to get the barcode with different format(code_128,PDF_417,QRCode).Why I am getting array indexout of bond exception only for code_39? I am using zxing-2.1 version.

         try{
         Writer write39 = new Code39Writer(); 
         BitMatrix bb = write39.encode( "WX1222276554",CODE_39,  0,0 );  
         }catch(Throwable t){
         System.out.println(t.toString());
         e.printStackTrace()
         {