JohannKa

Thanks @amalnanavati for this well documented issue : I was fighting with that for days thinking I wrongly set my roslibjs request... @sea-bass I just tested the `send_action_goals_in_new_thread` parameter set...

So... I tried to make a fix but I failed. My idea was to keep the normal logic for any op but to use a separate thread for the `cancel_action_goal`...