VMS Help CC, Messages, PROTOSCOPE2  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the struct type was previously declared
                with prototype scope in this function.  Now it is
                declared with a different prototype scope.

 Description    This function declaration contains a parameter that
                is a pointer to a type that has prototype scope, and
                an earlier declaration of the function contains a
                parameter that is also a pointer to a type that has a
                different prototype scope.  In most compiler modes
                this will cause the function redeclarations to
                differ.

 User Action    Avoid declaring types with function prototype scope.