I did post recently on this area, but I would really like to join a number of scores together to create a musical of 12 songs. The issue is that not all scores have the same instrumentation, resulting in an error message. Of course having different instrumentation in different pieces of music is inevitable. Is there are trick or way round this issue? I assume other people will have found this to be a problem. Thank you.
Add instruments to the scores so they all have the same instrumentation, then use 'Hide empty staves' to get rid of the non-playing instruments.
Add the all instruments in the same order to each score and select "hide empty staves" in the menu Style->General...->Score
In reply to Add the all instruments in by kuwitt
Why asking the basically same question twice? See https://musescore.org/en/node/232831
Same answer still applies, here with the addition of the hint to use 'Hide empty staves'.
In reply to Why asking the basically same by Jojo-Schmitz
Thank you, I've used Hide Empty Staves and it works great!