Description: The status of the last system load operation requested for this device. If the value of this object is in the range 1 to 18 inclusive, the download failed, and the value is an error code indicating the reason why. Codes 1 to 7 are a direct mapping from the TFTP error codes defined in RFC-783. The other error codes have the following meanings:- noResponse(8) load server failed to respond; noResource(9) the download could not be started because of a lack of resources; recLenMismatch(10) the record length differs from that implied by the value of the record length field; invalidRecType(11) the record type is not recognised; checksumError(12) record checksum error; wrongDevice(13) the device type in the file is incorrect; wrongHardwareVersion(14) the software image is not suitable for this version of the hardware; noFileHeader(15) the first record in the file was not a file header; byteCountError(16) the byte count reported in the file trailer record differed from the number of bytes actually received; invalidProgAddress(17) the load file contained a load address which was outside the valid range of memory; eraseFailed(18) unable to erase the program memory; progFailed(19) hardware error programming the memory. The meanings of the remaining values are as follows:- loadPending(20) a load has been requested but has not yet begun; loadActive(21) the device is currently being downloaded; success(22) the device has been downloaded successfully.