/sys$common/syshlp/helplib.hlb CC, Messages, NOTCOMPATIMP  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the type of the function "<name>" is not
                compatible with the earlier implicit declaration of
                "<name>" at <location>.

 Description    The declared type of a function does not match the
                type given to the function by its earlier implicit
                declaration.  This may cause unexpected behavior.

 User Action    Make sure that a valid function declaration is
                visible at the point in the source where the function
                is first called.