You might have a good connection, this error is often associated with the content levels set on logical table sources ... try setting the ones you need at their appropriate grain, then set the rest to their total levels.
Thomas, thanks for the response but you might as well have been replying in Greek. I have no idea what any of that means. Can you point me to a website that may be able to enlighten me?
" I created a BMM and Subject Area and deployed the repository."
In the BMM you need to create the appropriate dimensional hierarchies and then set your logical dimensions' and facts' Logical Table Sources' content levels to the appropriate level. This set the grain for the tables, so that the BI server knows how to craft the appropriate call to the data base for data.