MACROREDEFIN

Message        Macro redefined.

Description    A #define preprocessing directive has redefined a
               macro whose previous definition contained an error or
               warning.  Normally, the compiler will issue a warning
               if a macro is redefined to something other than the
               previous definition.  However, if the previous
               definition caused a warning or error to be generated,
               this informational message is output instead.

User Action    Do not redefine a macro without first undefining it.