The /LINES qualifier makes line number information available for the ERL
function, and the BASIC error reporter.
The format of the /LINES qualifier is as follows:
/[NO]LINES
Note that if ERL (or RESUME) is found in a program that is compiled
/NOLINES, HP BASIC for OpenVMS Alpha will not produce the message, but
will silently turn on /LINES.
If you specify /NOLINES, your program runs faster.
The default is /NOLINES.