VMS Help CC, Messages, PTRMISMATCH1  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the referenced type of the pointer value
                "<expression>" is "<type>", which is not compatible
                with "<target type>" because they differ by
                signed/unsigned attribute.

 Description    In a pointer assignment, the type pointed to by the
                source pointer is different than the type pointed to
                by the destination pointer.  In this case the types
                differ because the signed/unsigned type attributes
                are different.

 User Action    Correct the assignment to use compatible types.  This
                can be done by inserting a cast operand.