@sgospodarenko While conducting a test on another for another topic I encountered an unexpected problem when trying to export 3 photos to JPGs. Of the 3 selected photos only the first and third were actually exported, the middle photo was ignored. This occurred with a group of 3 JPGs to be exported and a group of 3 RAWs to be exported, both groups of 3 held in their own directory!
This snapshot shows the exports marked and underway:-
This snapshot shows the results, only 2 out of the 3 actually exported:-
From the data of the last snapshot it might be clear that I am re-investigating the issue of pre-PL5 DOPs being imported versus externally assigned metadata!