SETFILELEVEL <Integer>
The FILELEVEL system variable reflects the
$INCLUDE / $REQUIRE level of the timetable file
this command is placed in.
There is the possibility to check this file level by the conditional
text processing { ? ? } , and act differently for example, when a timetable file,
usually included in deeper level of a complex timetable is started exceptionally
for debugging purposes as the top level timetable.
The $SETFILELEVEL command can deceive this mechanism, and pretend another file level,
as the true value.
The pretended value set by the command does not influence the FILELEVEL reported by
other timetable files, either included from it, or used after it.