Axclient not found in Noetic

[jamesdangereux]

I’m in ROS IN 5 DAYS, Unit 7: ROS Actions: Clients, Ex 7.11

I ran roslaunch ardrone_as action_server.launch in Webshell1 and then rosrun actionlib axclient.py /ardrone_action_server in Webshell2.

Got the message : [rosrun] Couldn’t find executable named axclient.py below /opt/ros/noetic/share/actionlib

Looks like actionlib tools aren’t in the noetic actionlib folder?

[duckfrost2]

Hi,

Just tested it in the Noetic Version of the course and , it didnt guive me that error.
I executed the following:

ardone_action_client.py:

#! /usr/bin/env python
import rospy
import time
import actionlib
from ardrone_as.msg import ArdroneAction, ArdroneGoal, ArdroneResult, ArdroneFeedback

nImage = 1

# definition of the feedback callback. This will be called when feedback
# is received from the action server
# it just prints a message indicating a new message has been received
def feedback_callback(feedback):
    global nImage
    print('[Feedback] image n.%d received'%nImage)
    nImage += 1

# initializes the action client node
rospy.init_node('drone_action_client')

# create the connection to the action server
client = actionlib.SimpleActionClient('/ardrone_action_server', ArdroneAction)
# waits until the action server is up and running
client.wait_for_server()

# creates a goal to send to the action server
goal = ArdroneGoal()
goal.nseconds = 10 # indicates, take pictures along 10 seconds

# sends the goal to the action server, specifying which feedback function
# to call when feedback received
client.send_goal(goal, feedback_cb=feedback_callback)

# Uncomment these lines to test goal preemption:
#time.sleep(3.0)
#client.cancel_goal()  # would cancel the goal 3 seconds after starting

# wait until the result is obtained
# you can do other stuff here instead of waiting
# and check for status from time to time 
# status = client.get_state()
# check the client API link below for more info

client.wait_for_result()

print('[Result] State: %d'%(client.get_state()))

And then executed the folwing commands:

rosrun unit7_pkg ardrone_action_client.py
roslaunch ardrone_as action_server.launch

And it worked. Please check that you made ardrone_action_client.py executable by

chmod +x ardrone_action_client.py

That could be generating that error.

[NN01]

I don’t think this is the solution. I have the same problem that axclient.py is missing, whereas ardrone_action_client.py is certainly executable.

[roalgoal]

Hi, thank you for bringing this to our attention. We are working on implementing an axclient for noetic. For now, I’d ask you to skip exercise 7.11. I will come back here as soon as possible and notify you that it’s ready.

[roalgoal]

Hi, this issue is fixed. Just something to take into account, instead of rosrun actionlib axclient.py /ardrone_action_server, the command is now rosrun actionlib_tools axclient.py /ardrone_action_server

[atbecker]

@roalgoal Thanks for the update, it works! Can you update the instructions to reflect that in Section 7.11? (As of Feb. 3, the instructions are not asking for actionlib_tools). Also, can you do a search and replace for “Exercice” → “Exercise”.

[orfeas.kp]

this what i get when i execute the command. what am I doing wrong?

[rodrigo55]

I believe it is working fine, did you have any trouble seeing the client in the Graphical Tools?