thanks for the reply. Thats sort of what I thought. However I get different behaviour based on how hte rescan is initiated. For example - the scheduled scan that runs every 4 hours completes successfully in 1 second (so I assume it has nothing to do).
When I run this rescan manually as you mention, it finds a backup repository and adds 167 backups into the 'imported' folder and I get lots of unwanted records in the Veeam Backup database . So the behaviour is different in these two cases. If I could find the logs then this might help me find out what is going on.