I tried the suggestions you gave me but nothing worked. I got so frustrated I phoned PG Music. The fellow on the line was giving me step by step instructions but still to no avail. Then he asked me what version of BB I was using. I'm using version 2009.5. So for anyone out there having the same problem as I, in version 2009.5 and older (could even be from 2011 I don't know) to get the Melody Harmony to play in RealBand open Melody Harmony in BB by clicking on the M and a list of the harmonies will pop up. Select the harmony you want then select Write Harmony to Melody Track then click OK. Now the Melody Harmony will play when this BB file is opened in RealBand. I guess it would be a good idea to include the version of the programme being used when asking a question as different versions have different MOs.