# /cooper\_1/scan not ready yet Chapter 2 **URL:** \ **Category:** Python Basics For Robotics\ **Created:** [January 14, 2026, 10:34am UTC](https://get-help.theconstruct.ai/t/cooper-1-scan-not-ready-yet-chapter-2/39636 "2026-01-14T10:34:18Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![AntoineBrtzPolytech](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/a/eada6e/32.png) [@AntoineBrtzPolytech](https://get-help.theconstruct.ai/u/AntoineBrtzPolytech)\ **Post date:** [January 14, 2026, 10:34am UTC](https://get-help.theconstruct.ai/t/cooper-1-scan-not-ready-yet-chapter-2/39636/1 "2026-01-14T10:34:18Z")
Hi, In Chapter 2 of The Construct, I created a `RobotControl` class and a script `pyscript1.py` to test my Cooper robot. When I run the script, I get the following repeated error: [INFO] [1768386594.882140]: Robot Cooper… [INFO] [1768386594.883327]: Checking Laser… [ERROR] [1768386595.890448]: Current /cooper\_1/scan not ready yet, retrying for getting scan [ERROR] [1768386596.893438]: Current /cooper\_1/scan not ready yet, retrying for getting scan [ERROR] [1768386597.897136]: Current /cooper\_1/scan not ready yet, retrying for getting scan I checked with `rostopic list` and `/cooper_1/scan` exists in the simulation. ---
**Author:** ![bayodesegun](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/bayodesegun/32/10684_2.png) [@bayodesegun](https://get-help.theconstruct.ai/u/bayodesegun)\ **Post date:** [January 14, 2026, 11:58am UTC](https://get-help.theconstruct.ai/t/cooper-1-scan-not-ready-yet-chapter-2/39636/2 "2026-01-14T11:58:33Z")
Could you please share a full screenshot of your screen? That would help us to provide a better diagnosis… Here, I suspect that your simulation is not ready. Perhaps you have some red dots in the top-left corner of the simulation screen. ---
**Author:** ![AntoineBrtzPolytech](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/a/eada6e/32.png) [@AntoineBrtzPolytech](https://get-help.theconstruct.ai/u/AntoineBrtzPolytech)\ **Post date:** [January 15, 2026, 11:32am UTC](https://get-help.theconstruct.ai/t/cooper-1-scan-not-ready-yet-chapter-2/39636/3 "2026-01-15T11:32:57Z")
I found a solution: I changed networks and it worked. Thanks for the help! ---
**Author:** ![system](https://get-help.theconstruct.ai/uploads/default/original/2X/9/9d3ce8305cc0d0d9b6e07d15767a6f245c526f1b.jpeg) [@system](https://get-help.theconstruct.ai/u/system)\ **Post date:** [January 20, 2026, 11:33am UTC](https://get-help.theconstruct.ai/t/cooper-1-scan-not-ready-yet-chapter-2/39636/4 "2026-01-20T11:33:34Z")
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