I had a project which I was working on. I upgraded to Dorico 5 last week on my iPad and now it says “Error opening file”. To make matters worse, there’s no support except for this Forum apparently. I tried sending the file to my mac and opening it on Dorico there, but I get the same error.
I’d recommend that you send the file to one of the Dorico team, who can maybe see if there’s anything salvageable.
Email it to d (dot) spreadbury (at) steinberg (dot) de
(Once you’ve posted a few replies and read a few threads on this board, you should gain “privileges” to upload stuff directly into posts.)
The act of upgrading the app shouldn’t affect existing files. Any other ideas about what might have happened? Is the file on iCloud Drive, or “on the iPad”, or DropBox, etc?