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

  SEVERITY:  F

  MESSAGE TEXT:  Invalid argument to %VAL, %REF, %DESCR, or %LOC

  EXPLANATION:  The argument specified for one of the built-in
  functions was not valid.  Examples:

     %VAL (3.5D0)    Error: Argument cannot be REAL*8,
                            REAL*16, character, or complex.
     %LOC (X+Y)      Error: Argument must not be an expression.