VMS Help FORTRAN, Error Messages, Compilation Errors, USEBEFDEF  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  SEVERITY:  I

  MESSAGE TEXT:  Use of variable before definition; name in SAVE
                 statement if appropriate

  EXPLANATION:  A variable in a subprogram was used before its
  value was defined.  This may have been intentional, with an
  assumption of implicit SAVE semantics, but may also have been
  a programming error.  This message can be suppressed with
  /WARNINGS=NOUNINITIALIZED.

  USER ACTION:  If intentional, name the variable in a SAVE
  statement and make sure that it is properly initialized.
  Initialization to zero is not guaranteed on all implementations.