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

  SEVERITY:  E

  MESSAGE TEXT:  %VAL, %REF, or %DESCR used in invalid context

  EXPLANATION:  The argument list built-in functions (%VAL, %REF, and
  %DESCR) cannot be used outside an actual argument list.  Example:

     X = %REF(Y)