Hello and thankyou for the reply
Unfortunately I can't provide you a link that you can actually see. The page is running on a NHS Medical intranet server and contains patient information. I can paste the link so that you can see the query string if that might help.
the page is: outbreak_details.asp?outbreak_id=18
The graph will display properly on the above page if it connects to the database showing all outbreak_ids. But if I apply the filter that says outbreak_id = URL Paramater outbreak_id then the graph displays the data parser error.
This would be really useful on this page if I can get this working.
Many thanks in advance