I just started a new project using a template for all the instruments I use. then I imported and xml file (from Sibelius), moved all the music to a new flow (not trusting the original xml import!). I chose ‘Merge with existing players where possible’. I then, in Setup mode, deleted the imported xml flow and also 2 instruments (and layouts) that were not merged. I saved the file and then the crash then happened on reverting to Write mode.
When I reopened Dorico and also opened the last backup (which opened in Setup mode since I had saved just before reverting to Write mode), it worked perfectly. So I am still in the dark.
I attach a diagnostic report after the crash and also another after it worked OK the 2nd time.
Unfortunately the zipped file is too big to send on this forum.
I made it smaller with diagnostic reports - but now Dorico won’t crash.
Perhaps some change in the Diagnostic reports might help?
Dorico Diagnostics 1.zip (1.59 MB)
Dorico Diagnostics 2.zip (1.65 MB)