This was very edifying, thank you for sharing! I am in a previously created VA report and I created parameters after the fact (using Create Parameter from Data Item) and then assigned the parameter in the drop-down list that uses the category. Note - I do NOT have a Current Value assigned to the parameter I am trying to use the parameter in a custom URL (as described here: https://blogs.sas.com/content/sgf/2015/09/16/accessing-va-reports-with-parameterized-urls/) The Category I am referencing is a simple, Yes/No selection and I cannot get the resulting display of the custom URL to influence the selection. Any thoughts would be most appreciated. Thank you, PJ