Edwin,

Thanks for posting a workbook.  Unfortunately, it is not packaged (.twbx) and does not include the data -- so when I or anyone else opens it, it is blank.

Would you be able to re-post it as a packaged workbook?  Thanks!

Best Regards,

Joshua

By the way, I'm not sure if this is what you are going for, but when you edit an ad-hoc group, there is an option to Include 'Other' as a group where new values will find a home.

Regards,

Joshua

So if I were to use this field 'Category(group)' as one of my parameter dropdown. How do I? In the above example it would show the individual group listed (Furniture & Office Supplies', ' Other') rather than the Category (group)?