Thanks @angus-g, I’ve done the finalisation step - hopefully it works now? Your version is a bit bigger than the one I made, which I guess is a good sign…
-r--r----- 1 aek156 ik11 11360538624 May 27 16:57 cosima_master_2025-05-27.db
-r--r----- 1 aek156 ik11 11469996032 May 29 10:29 cosima_master_2025-05-28.db