SharePoint Designer 2010 – Reusable Workflows – Associate to List feature

If you build a re-usable workflow and click the "Associate to List" feature without first publishing it you will get an ASP.NET error on the addwrkfl.aspx page.  The error is an Object Not Found NullReference error.  You would think that you would get a nice SharePoint error dialog box, but not in this case.  This could be a confusion point for your users.

Chris