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

  SEVERITY:  E

  MESSAGE TEXT:  Substring reference used in invalid context

  EXPLANATION:  A substring reference was made to a variable or array
  that is not of type CHARACTER.  Example:

      REAL X(10)
      Y = X(J:K)