This carries the actual reason text explaining why a command file failed to download or execute, as reported in the failed command-file notification. This is the object that actually tells an admin what to fix, distinguishing a download-stage failure, server unreachable or wrong filename, from an execution-stage failure, a command in the file that the device rejected, each of which points at a completely different remediation. For example, this might read TFTP timeout for a download-stage failure pointing at server reachability, versus unrecognized command at line 12 for an execution-stage failure pointing at the file's own content being wrong for this device.