| enum   | {  
  URG_NO_ERROR =  0, 
URG_UNKNOWN_ERROR =  -1, 
URG_NOT_CONNECTED =  -2, 
URG_NOT_IMPLEMENTED =  -3, 
 
  URG_INVALID_RESPONSE =  -4, 
URG_NO_RESPONSE =  -5, 
URG_SEND_ERROR =  -6, 
URG_RECEIVE_ERROR =  -7, 
 
  URG_CHECKSUM_ERROR =  -8, 
URG_INVALID_PARAMETER =  -9, 
URG_MEASUREMENT_TYPE_MISMATCH =  -10, 
URG_COMMON_ERROR_LAST, 
 
  URG_SERIAL_OPEN_ERROR =  (URG_COMMON_ERROR_LAST -1) -1, 
URG_NOT_DETECT_BAUDRATE_ERROR =  (URG_COMMON_ERROR_LAST -1) -2, 
URG_ETHERNET_OPEN_ERROR =  (URG_COMMON_ERROR_LAST -1) -3, 
URG_SCANNING_PARAMETER_ERROR =  (URG_COMMON_ERROR_LAST -1) -4, 
 
  URG_DATA_SIZE_PARAMETER_ERROR =  (URG_COMMON_ERROR_LAST -1) -5
 
 } |