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

  Negative form:  /NOMACHINE_CODE

  Controls whether the listing produced by the compiler  includes  the
  User   Interface   Description   (UID)  code  generated  during  the
  compilation.   You  must  include  the  /LIST  qualifier  with   the
  /MACHINE_CODE qualifier on the command line.

  The default is /NOMACHINE_CODE.