The fault-tolerance error-log file, LANROOT\\LOGS\\FT.LOG, had the update in progress bit set upon opening, which means that the system crashed while working on the error log.
Any action to correct the problem should be performed on that computer. The server crashed while accessing the fault-tolerance error log, possibly damaging that log. The damaged fault-tolerance error log was cleared after its contents were backed up to LANMAN\\LOGS\\FT.ERR.
No action is needed.