Hi,

We are using a Sawyer robot. I used this link to set up my ROS env:

https://support.rethinkrobotics.com/support/solutions/articles/80000980134-workstation-setup

Based on this link's instructions, I run the following commands:

student@PATY162-1:~$ cd rethink_ws/
student@PATY162-1:~/rethink_ws$ ./intera.sh 
[intera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ echo $ROS_MASTER_URI
http://10.139.0.116:3000
[intera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ 
[intera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ echo $ROS_PACKAGE_PATH
/home/student/rethink_ws/src:/opt/ros/noetic/share
[intera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ env | grep ROS
ROS_VERSION=1
ROS_PYTHON_VERSION=3
ROS_PACKAGE_PATH=/home/student/rethink_ws/src:/opt/ros/noetic/share
ROSLISP_PACKAGE_DIRECTORIES=/home/student/rethink_ws/devel/share/common-lisp
__ROS_PROMPT=1
ROS_IP=10.139.0.224
ROS_ETC_DIR=/opt/ros/noetic/etc/ros
ROS_MASTER_URI=http://10.139.0.116:3000
ROS_ROOT=/opt/ros/noetic/share/ros
ROS_DISTRO=noetic

But, when I use roscore command, I get this error:

[intera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ roscore
... logging to /home/student/.ros/log/9eedb1e2-14ea-11ed-b88b-a1903e911010/roslaunch-PATY162-1-45701.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://10.139.0.224:39981/
ros_comm version 1.15.14


SUMMARY
========

PARAMETERS
 * /rosdistro: noetic
 * /rosversion: 1.15.14

NODES

**WARNING: ROS_MASTER_URI [http://10.139.0.116:3000] host is not set to this machine**
auto-starting new master
process[master]: started with pid [45720]
ROS_MASTER_URI=http://10.139.0.224:11311/

setting /run_id to 9eedb1e2-14ea-11ed-b88b-a1903e911010
process[rosout-1]: started with pid [45741]
started core service [/rosout]

When I command rosnode list, I get this error:

ntera - http://10.139.0.116:3000] student@PATY162-1:~/rethink_ws$ rosnode list
Traceback (most recent call last):
  File "/opt/ros/noetic/bin/rosnode", line 35, in <module>
    rosnode.rosnodemain()
  File "/opt/ros/noetic/lib/python3/dist-packages/rosnode/__init__.py", line 810, in rosnodemain
    sys.exit(_rosnode_cmd_list(argv) or 0)
  File "/opt/ros/noetic/lib/python3/dist-packages/rosnode/__init__.py", line 623, in _rosnode_cmd_list
    rosnode_listnodes(namespace=namespace, list_uri=options.list_uri, list_all=options.list_all)
  File "/opt/ros/noetic/lib/python3/dist-packages/rosnode/__init__.py", line 295, in rosnode_listnodes
    print(_sub_rosnode_listnodes(namespace=namespace, list_uri=list_uri, list_all=list_all))
  File "/opt/ros/noetic/lib/python3/dist-packages/rosnode/__init__.py", line 275, in _sub_rosnode_listnodes
    nodes = get_node_names(namespace)
  File "/opt/ros/noetic/lib/python3/dist-packages/rosnode/__init__.py", line 130, in get_node_names
    state = master.getSystemState()
  File "/opt/ros/noetic/lib/python3/dist-packages/rosgraph/masterapi.py", line 481, in getSystemState
    return self._succeed(self.handle.getSystemState(self.caller_id))
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1109, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1450, in __request
    response = self.__transport.request(
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1153, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/lib/python3.8/xmlrpc/client.py", line 1183, in single_request
    raise ProtocolError(
**xmlrpc.client.ProtocolError: <ProtocolError for 10.139.0.116:3000/RPC2: 404 Not Found>**

Nonetheless, if I type 10.139.0.116:3000 in chrome, I can communicate with the robot as described here: https://support.rethinkrobotics.com/support/solutions/articles/80000976823-connecting-sawyer-to-intera-studio