During the stop of tensorboard, the cell will stack trace if no running tensorboard instances

[netskink]

Here is a fix

Stop tensorboard instances

pids_df = TensorBoard.list()
if not pids_df.empty:
  for pid in pids_df['pid']:
    TensorBoard().stop(pid)
    print 'Stopped TensorBoard with pid {}'.format(pid)

[lakshmanok]

Thanks, this is in many notebooks ... we'll fix them as we come across them.

[netskink]

You are welcome. I’ll upload the other occurrences as I find them as well. I look forward to helping as I can.