/sys$common/syshlp/helplib.hlb FORTRAN, Error Messages, Compilation Errors, EXT_ARIREQ  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  SEVERITY:  I

  MESSAGE TEXT:  Extension to FORTRAN-77:  Arithmetic expression
  required

  EXPLANATION:  A logical expression was used in an arithmetic IF
  statement.