Many thanks for the suggestions so far.

Yes, all I want to do is replace Realdrums with midi drums, accepting that the result will be somewhat different. I'm now wondering, though, if I'm attempting the impossible in this case!

I can force, with impunity, Realdrums to midi drums (using 'Force drums to midi track') on songs that 'natively' have a Realdrum track. However, the style in question - _MOVIEST.STY StingQuart. Solo-Acc Piano[85RS]

doesn't use drums. I can add Realdrums to it and it plays them, but if I try 'Force drums to midi track' then the green text describing the Realdrums track disappears and nothing takes its place. If I then try to add a midi drum track (as described in my first post), nothing is heard.

Is anyone able to tell me please if what I'm trying to do is simply not possible with this style, or if maybe there is a way of editing it to make it do what I'd like it to!?