Hi Matt,

If you created a query that pulls in data from other tables, then it's probably going to be "query.sort=ParticipantId".

A quick way for you to tell is to bring up the grid view of what you created and look at the URL string in the address bar.

For example:

If it says "query-executeQuery.view", then it's a query and you would need to use "query.sort=ParticipantId".

If it says "study-dataset.view", then you would use "Dataset.sort=ParticipantId"

Regards,

Jon