How do I enable multiple files to be uploaded via drag & drop?

Hi,

The error in your image relates to unique submission requirements:

http://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form

However, if you are indeed looking for a drag and drop file upload widget, this should be able to do what you are looking for:

http://widgets.jotform.com/widget/drag_and_drop_upload

If neither of these solutions suit your needs, just let us know and we will be happy to see what else we can do.

Of course!  While "playing around," I had set the form limit to "strict" ...

Thanks for getting me back on track!

You are very welcome, we are here to help.  Just let us know if there is anything else we can do for you.