This reports the total count of lines that failed during a configuration file apply, carried in the summary-level notification as opposed to the per-line notification. This gives an admin a quick severity read at a glance: a file with only 1 failed line out of hundreds is probably a single typo worth a quick fix, while a value near the cap of 64 suggests something more systemic, like applying a configuration file meant for a different firmware version or hardware model entirely. For example, seeing this reach 40 or more failed lines after applying a config backup would strongly suggest the backup was taken from an incompatible software version.