If you specify the '-y a' option on bwtraceroute, and tracepath times-out, then none of the tracepath results will be output. If you do not specify this option, you get the partial output which is more desired. It's unclear why this happens since the -y option should only add the -n option to tracepath, and tracepath seems to run fine when that is set. It would be desirable for the partial path to be output even when '-y a' is set.
If you specify the '-y a' option on bwtraceroute, and tracepath times-out, then none of the tracepath results will be output. If you do not specify this option, you get the partial output which is more desired. It's unclear why this happens since the -y option should only add the -n option to tracepath, and tracepath seems to run fine when that is set. It would be desirable for the partial path to be output even when '-y a' is set.