>Ah I think I can see the problem - I have a View that appears in the Project Manager without a View Icon - all the rest have. When I click on it I can rename it but if I try and remove it I get the message 'Database is Invalid - please Validate' which I have done! Any ideas of how to get rid of this view - I think it is the cause of the problem...

The easy way: open the dbc as a table, locate the bad record and delete it. That should do it.

José