Ah, impulsive me. Before I saw the response, I had I deleted PE from the iPad and re-downloaded it, hoping that might fix the problem. It seems to have fixed the immediate crashing, but unfortunately also must have deleted any associated files. No report log available now.
I’ll have to wait a few days and re-download my maps.
I the meantime, the attached file, when Imported, does not contain my Groups. Guess I’ve created more problems than I’m solving!
Edited to add: [2015-06-24 08h40m13s]Export.pocketearth_archive is too large to send through the Forum, so I can’t attach it to give information about the missing Groups. Sorry!