how do I hide empty fields

I assume you are referring to hiding empty fields on email alerts.  If that is the case, here is our guide on how to do so:

http://www.jotform.com/help/256-How-to-Hide-Empty-Fields-on-Email-Alerts

If there is something else you are looking for, let us know a bit more detail regarding your needs and we will be happy to assist you further.

Thanks David.

I had to delete and recreate the notifier and then it worked.

I think I had some bad data so I am good now.

Thanks,
Sean

The hide empty fields function only works for the default email.  If you were using a modified email previously, the function will not have worked.