I am getting the 117 error when i tried to execute the following command so please let me know what is the real cause of it and what needs to be done to fix it( i am new to scanner SDK integration) . I am want to send back a beep sound back to Scanner , but not able to do that  because of the above error. I have enabled HID_KB_PUMP_SETTINGS in config file so please see the below attached screen shot . I am using USBHIDKB mode to send back the message to scanner .My Scanner model is LS4278

   int opcode = 6000; // Method for Beep the beeper
            string outXML; // Output
            string inXML = "" +
            "1" + // The scanner you need to beep
            "" +
            "4" + // 4 high short beep pattern
            "" +
            "";
            cCoreScannerClass.ExecCommand(opcode, ref inXML, out outXML, out status);