Similar problem on one of my systems. Scheduled incremental backup -
system re-boots while ADSM V3R1L7 (NT4 SP5 or 6?) has just worked with
several files w/300+ character path length. (Not sure what could be left to
say in document?) BACKUPEXEC also causes re-boot in  same area. Will try
tonight with memoryefficientbackup yes, system owner also will make copy of
file with shorter path length.