title: Database Project - "Reference to external elements from the source named x could not be resolved
body: <p>We have two database projects, <code>x</code> and <code>x_audit</code>. <code>x</code> has a reference to <code>x_audit</code>.</p>
  
  <p><code>x_audit</code> deploys fine, but when trying to deploy <code>x</code> we get the error:</p>
  
  <p><code>The reference to external elements from the source named x_audit.dbschema could not be resolved, because no such source is loaded</code>.</p>
  
  <p>The same files work fine deploying to a 2005 database, we only get this error when deploying to 2008. If it makes any difference, this is upgrading an existing database rather than creating a new one. It used to work fine on both 2005 and 2008, not sure what's changed.</p>
  
  <p>Thanks</p>