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

 Message        In this declaration, "<name>" has no linkage and is
                of an incomplete type.

 Description    A declaration with no linkage cannot specify an
                incomplete type.  Incomplete types can only be used
                for identifiers with external or internal linkage.

 User Action    Either complete the type before the declaration or
                modify the declaration to specify an external or
                internal linkage.