VMS Help CC, Messages, MISMATPARAM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> parameter <number> has a different type
                than specified in an earlier declaration of this
                function.

 Description    A function has been redeclared with a parameter whose
                type is different than the type specified in a
                previous declaration of the function.  This generally
                leads to additional errors.

 User Action    Correct the function declarations so that the
                parameter information is the same in each
                declaration.