public String readFrame(String frameName) {
   KRLFrame frame = new KRLFrame(frameName);
   try {
     this.connection.readVariable(frame);
   } catch (Exception e) {
     System.out.println("Error reading frame from Robot");
   }
   return "Frame: "
       + frameName
       + ", X: "
       + frame.getX()
       + ", Y: "
       + frame.getY()
       + ", Z: "
       + frame.getZ()
       + ", A: "
       + frame.getA()
       + ", B :"
       + frame.getB()
       + ", C : "
       + frame.getC();
 }