VMS Help BASIC, /OLD_VERSION  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   The /OLD_VERSION qualifier is provided  for  compatibility  with  previous
   versions of VAX BASIC.

   The format of the /OLD_VERSION qualifier is as follows:

      /[NO]OLD_VERSION[=CDD_ARRAYS]

   When you use the /OLD_VERSION qualifier, the compiler  changes  the  lower
   bound  to  zero  and  adjusts  the upper bound of the array.  For example,
   Array 2:5 in CDD/Repository is translated by the compiler to be  an  array
   with  a  lower bound of 0 and an upper bound of 3.  The compiler issues an
   informational message to confirm the array bounds.

   The /NOOLD_VERSION qualifier causes the compiler to extract an array  from
   CDD/Repository  with  the bounds as specified in the data definition.  For
   example, Array 2:5 in CDD/Repository is translated by the compiler  to  be
   an array with a lower bound of 2 and an upper bound of 5.

   CDD/Repository assumes a default lower bound of 1, if none  is  specified.
   Therefore,  if  no  lower  bound is specified, the compiler translates the
   CDD/Repository array to have a lower bound of 1.  For example, Array 5  in
   CDD/Repository  is  translated by the compiler to be an array with a lower
   bound of 1 and an upper bound of 5.

   The default is /NOOLD_VERSION.