SWFUpload is not defined

I also get this error message. I've tried doing what Aquilasfx said, like it also said in the README, but I still get the error message. It is for all references to SWFUpload in the file js/swfupload.src.js.

Any ideas?

This error occurs is because the file swfupload.js isn't loaded properly. You need to be sure the file exists in its expected location (sites/all/modules/swfupload/swfupload/swfupload.js). You could put an alert statement on top of the swfupload.js file to get a notification on page load. e.g.: alert('swfupload.js loaded');