SUBSYSTEM is a reserved word that is used to group entries in the configuration file. It indicates the start of a group of related keywords called a "subsystem." It cannot be used on its own.
In V11.5 and later, FairCom Server supports commenting out a SUBSYSTEM block in ctsrvr.cfg by commenting out just the line containing the SUBSYSTEM keyword. Prior to this enhancement, each line of the SUBSYSTEM block had to be commented out. Now an entire SUBSYSTEM block can be commented as shown below:
;SUBSYSTEM EVENT DISK_FULL_ACTION {
volume VOLUME
limit LIMIT
run EXE [OPTIONS]
freq FREQUENCY
maxruntime MAXRUNTIME
}