Black Hole: Error: 0 0 Call to undefined function is__writable()

Is what comes up when I click on the recent Black Hole TR...  somewhat appropriate I suppose   but I'm thinking it's probably not intentional?

Tried it with both FF and Chrome browsers, both return "Error: 0 0 Call to undefined function is__writable()"  Other TRs display correctly.

Thanks for posting the TR, and for the alert here. The GPX file was missing the file extension - after adjusting the file name to include ".gpx", all works like a charm.