There’s a problem with your repeat structure, Iain, so I’m afraid Dorico is going to keep turning off Play repeats every time you open the project until you fix it! Where is the end repeat barline at the end of bar 43 meant to go back to?
There’s a problem with your repeat structure, Iain, so I’m afraid Dorico is going to keep turning off Play repeats every time you open the project until you fix it! Where is the end repeat barline at the end of bar 43 meant to go back to?