Brian

If you try the export again to the same folder does it start from where it finished? If you look at the exported folders do they go from A-Z or stop short on T for example?

You can run Sooloos interrogator against your Sooloos core and it will provide you with a list of albums and in Roon you can do the same by going to album view, select all albums using Ctrl a or cmd a depending on if you are using Windows or Mac? Then next to the play button At the top left is a + click on it and select export to xslx.

Sooloos interrogator is available from the streaming forum of HH's

Once you have the files it is fairly straightforward to do a difference between them and identify what is missing?

Cheers

Russ