You can update a script to change a command line or to add a command line
to a script.
Appending a new command
To append a command line to an existing script issue the
UPDATE SCRIPT command without the LINE= parameter. The appended command line
is assigned a line number of five greater than the last command line
number in the command line sequence. For example, if your script ends
with line 010, the appended command line is assigned a line number
of 015.