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

 Message        <Context> the bitfield width expression
                "<expression>" is outside the range <lower> to
                <upper>.

 Description    A bitfield width specifier was either less than zero,
                or is greater than the number of bits in an int.  In
                some modes, the compiler will assume a width
                specifier equal to the number of bits in an int.

 User Action    Use a valid bitfield width specifier.