I created a full set of contents and indexes for a song book, but then I realised there were some errors in it, so I exported the contents, fixed the problems in the XML file, and tried to import it. There are no error messages, but nothing is imported. The XML is well-formed. I even deleted the current contents with the errors, but hasn’t helped. Having spent a good chunk of the last two days getting everything almost right, I don’t want to have to do it again!
This is RAB 8.6.3 on Mac, running macOS 11.2.3, if that makes any difference.