Why the magnet url can't be download by aria2?
 

Now let us open an url first.
http://kickasstorrentsan.com/the-bos...t12869588.html
To right click the Torrent magnet link and download it with deluge.

To open the same position with firebug and copy the Torrent magnet link into /tmp/test.magnet

magnet:?xt=urn:btih:177DC7A0C1A23F0A86C7BBDE6CD95F6A65998DFF&dn=marauders+2016+hdrip+xvid+etrg&tr=ud p%3A%2F%2Ftracker.publicbt.com%2Fannounce&tr=udp%3A%2F%2Fglotorrents.pw%3A6969%2Fannounce&tr=udp%3A% 2F%2Ftracker.openbittorrent.com%3A80%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannou nce

Now to test to download with aria2c command.

method 1:
url="magnet:?xt=urn:btih:177DC7A0C1A23F0A86C7BBDE6CD95F6A65998DFF&dn=marauders+2016+hdrip+xvid+etrg& tr=udp%3A%2F%2Ftracker.publicbt.com%2Fannounce&tr=udp%3A%2F%2Fglotorrents.pw%3A6969%2Fannounce&tr=ud p%3A%2F%2Ftracker.openbittorrent.com%3A80%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2F announce"
aria2c $url

method 2:
aria2c -i /tmp/test.magnet

Nothing can be downloaded until for one hour.
Why the Torrent magnet url can only be downloaded by deluge not by aria2?

Try just