ERROR: Unable to communicate with master! when launching real robot lab on gazebo

Course Support ROS Basics In 5 Days (Python)
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RLException: ERROR: unable to contact ROS master at [http://4_simulation:11311]
The traceback for the exception was written to the log file

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Hi @horth.alec ,

I ran into that issue once or twice. The solution (that worked for me) was to clear history and cookies of your browser and login again into The Construct Sim and load rosject simulation studio.

This may not be the working solution, but it has worked in my case.

Let me know if the same worked for you.

Regards,
Girish

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Hello @girishkumar.kannan,

thank you for your answer :slight_smile: Alright I will try and keep you on touch if it worked.

best regards

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It worked ! thank you

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@horth.alec ,

Glad to know it worked for you too!

— Girish

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