many huge relations show “Application error”, e.g.
Browser = Firefox (Windows)
The OpenStreetMap server encountered an unexpected condition that prevented it from fulfilling the request (HTTP 500)
Feel free to contact the OpenStreetMap community if your problem persists. Make a note of the exact URL / post data of your request.
This may be a problem in our Ruby On Rails code. 500 occurs with exceptions thrown outside of an action (like in Dispatcher setups or broken Ruby code)