UCNNOMAP

Message        A UCN escape sequence was recognized, but there was
               no translation for it into the current codeset.  The
               escape sequence will be used verbatim.

Description    A Universal Character Name (UCN) escape sequence was
               recognized, but there was no translation for it into
               the current codeset using the iconv library routine.
               The complete escape sequence itself, including the
               backslash, will be used in the object module.

User Action    Make sure your locale is set at compile-time to use a
               codeset for which a converter from UCS-4 is
               available, and which supports all of the characters
               that are expressed as UCNs in your program.
               Alternatively, change your code to avoid the use of
               UCNs, e.g.  using hexadecimal escape sequences.