Charlie.
Thats great,i can work with that.
I did try several things trying to sort it, i thought it was something to do with midi drivers and stuff like that.
i would never have thought of the style disabled thing because its always disabled when i have opened midi file this way.

Once again thank you for spending your time on this subject and other posts i have made.

rebuilt styles,songs and real tracks.
win 10...amd a10 radeon r6 4c+6g 1.8ghz
64 bit hp envy
biab 2023 with 1004 build. styles 1 to 429 plus extras 1,2,3,4 and 6.
running as admin,cleaned up returned to factory settings.