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.