Yup, just thought of trying the Media Manager as soon as I posted – will know in 5 hours if that works… If it does, hopefully that new project will relink to different drives. Not really a solution if it doesn’t.
Fingers crossed, but not very optimistic, as googling and forum-searching seems to indicate that “unspecified path” message is pretty much a death sentence (though few of the people who reported it had the luxury of access to both a working, linked drive-setup, and the broken, derived one, so maybe…).
There is nothing that I can spot in the meta data, but haven’t looked thoroughly. Will check that out in the morning if the Media Manager is a bust.
Thanks for the response, Nick.