# Gradebot Keeps Failing My Subscriber

**URL:** <https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243>\
**Category:** ROS Basics In 5 Days (Python)\
**Tags:** error, quiz\
**Created:** [September 26, 2025, 9:29am UTC](https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243 "2025-09-26T09:29:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![kc2023](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/kc2023/32/10078_2.png) [@kc2023](https://get-help.theconstruct.ai/u/kc2023)\
**Post date:** [September 26, 2025, 9:29am UTC](https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243/1 "2025-09-26T09:29:12Z")

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I can’t report it with the button as every time I have tried it won’t stop buffering endlessly.

Gradebot keeps telling me that I’m not subscribed despite me now fixing my error from the first time around. When I launch my code (successfully) and do `rostopic echo /kobuki/laser/scan` it prints out data that the topic is receiving, so it is definitely subscribed. Since I’m on my 3rd attempt I don’t want to waste another one doublechecking that Gradebot isn’t just bugging out. Is there anything I can do?

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**Author:** ![kc2023](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/kc2023/32/10078_2.png) [@kc2023](https://get-help.theconstruct.ai/u/kc2023)\
**Post date:** [September 29, 2025, 8:11am UTC](https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243/2 "2025-09-29T08:11:50Z")

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![image](https://get-help.theconstruct.ai/uploads/default/original/2X/c/c14a4df80ade7226e9dc437b9cea3743098461c0.jpeg)

I can’t report it properly. Is there anyone that can attend to my issue?

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**Author:** ![duckfrost2](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/duckfrost2/32/9365_2.png) [@duckfrost2](https://get-help.theconstruct.ai/u/duckfrost2)\
**Post date:** [September 29, 2025, 8:41am UTC](https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243/3 "2025-09-29T08:41:32Z")

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Hi,  
After checking, I think your issue was that you didn’t have correct name of the node. You named it in the launch file “topics\_quiz” and it should be as indicated in the instructions “topics\_quiz\_node”. Please follow strictly the instructions an dnaming told in the instructions otherwise the gradebot wont know where to look for the subscribers and fail. Your grade is now 10 /10 😉

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**Author:** ![system](https://get-help.theconstruct.ai/uploads/default/original/2X/9/9d3ce8305cc0d0d9b6e07d15767a6f245c526f1b.jpeg) [@system](https://get-help.theconstruct.ai/u/system)\
**Post date:** [October 4, 2025, 8:41am UTC](https://get-help.theconstruct.ai/t/gradebot-keeps-failing-my-subscriber/38243/4 "2025-10-04T08:41:42Z")

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