So you are using Data Assist 2. Do you have the latest version 2.1.0 installed?
What other extensions, including the version numbers are installed?
The code at line specified in the error seams to have to do with the filtering for the results page.
what if you don't set the filtering section on step 4 of the wizard? After the results page is created, you can edit the recordset on the results page to add the filter.