That's the strange thing Mac.... the track playes the full length and the numbers show it goes from 3 - 113 (plus the 2 bar ending). All the MIDI tracks generated correctly from 1 - 113 (allowing for count-in) which is what I had set the parameters to in the boxes you mention rharv.

The thing I really don't understand is why, when I import the piano MIDI into Cubase it is the correct length, but when I convert it to WAV or Audio it is short (81)?

This whole thing came about because I wanted to replace the MIDI drums with EZDrummer instead of Real Drums. The default drum set is Pop which I didn't want to use. I wanted the Vintage set. This worked great during play back in RB but would not render to the Vintage set, it kept going back to Pop. I tried everything to get it to produce a WAV/Audio of the Vintage set but gave up.

I then thought I would simply import the drum MIDI into Cubase and use EZDrummer from there.

This is where I started to run into the problems of MIDI and WAV length issues.

I would prefer if possible not to regenerate the Bass RealTrack because I've got it just how I want it.........but, if that what it takes........

Still doesn't make any sense to me though.