What are you trying to filter? Is this field on every worksheet? Global filters only work on a single data source. Can you possibly post the twbx you're working with?
I cant post the workbooks sorry, but the fields are basically meaningful geographic locations on the map. They have a name which is associated with an inputted lat and long. The field is being used in all three parts of the dashboard (map, chart, and table) but the lats and longs are from one data source and the point names are from another data source. Does this help any? Thanks for the reply.