While trying to open a gpx file, I get an error “an unexpected exception occurred”. I used to do that without a problem in previous versions. The current JOSM version is 17084
Note: The gpx was created in Alpinequest with which I had no problems before
Did you get this sorted out yet? If not can you post a link to the gpx file on dropbox or google or someplace?
Running JOSM from a shell or command prompt and posting the full error log somewhere would likely help too.
I do not know how to upload a link,
But I found a partial solution, I converted to KML and saved back as GPS in another website “GPS visualizer” . It solved the error when I brought it back.