failed to attach extern robot controller:no avaliable

There could be a few reasons why you are getting this error message. Here are some things you can try:

1. Make sure the robot controller is properly connected to your system. Check all the cables and connections to ensure they are secure.

2. Check that the robot controller is powered on and ready to receive commands.

3. Verify that the robot controller software is correctly installed on your system. If not, try reinstalling it.

4. Ensure that the robot controller software is compatible with your operating system.

5. If you are using a third-party robot controller, make sure it is compatible with the software you are using.

6. Check that the correct IP address and port number are entered in the software settings.

If none of these steps work, you may need to contact technical support for further assistance.