I've searched the forums and found a few references to this problem but nothing relating to a solution.
I downloaded Recova on a recommendation after losing roughly 5,000 music files from my 120Gb iPod Classic (I'm not really sure how it happened originally). The iPod still works correctly, as I put a few 'test' songs on it to check, and they play correctly.
However, when I run Recova - and answer the questions in the wizard - nothing seems to happen, apart from a message in the bottom corner of Recova saying 'The parameter is incorrect'. None of the advanced options seem to make any difference.
Can anyone help? There are several 'iPod restoration' software options on the internet, but they are expensive and there's no guarantee they would work.