UNUSEDTOP

Message        This include directive does not contribute to the
               compilation, perhaps because the file has already
               been included.

Description    The contents of this top-level include file are not
               used by the rest of the compilation.  This message
               can occur when the include file has already been
               included, perhaps by a nested include file.

User Action    For compilation efficiency, you can exclude this
               include file when compiling with the current set of
               compilation options.