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

  SEVERITY:  I

  MESSAGE TEXT:  Extension to FORTRAN-77:  Nonstandard loop
  expression

  EXPLANATION:  The upper bound expression, lower bound expression,
  or increment expression of a DO loop was not of type integer, real,
  or double precision.