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

 Message        <Context> "<expression>" is of type "<type>", and
                cannot be converted to "<target type>".

 Description    An expression of one type cannot be converted to the
                type required by this expression.  This most often
                occurs when the source type of an assignment or cast
                cannot be converted to the destination type.  The
                rules for which types can be converted are rather
                complicated and differ based upon the compiler mode.
                Refer to the language documentation for a complete
                list of valid combinations.

 User Action    Modify the conversion to use valid types.