Go to Options > Preferences > RealTracks and Tick "Save RealCharts in Midi Files. Go to File > Make a Standard Midi File.
The track needs to have RealCharts, if it is green with an underline it should, also in the the realtrack picker window there is a Chart column that will say if it has a Chart.
is is easy to access in RealBand http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=182571#Post182571