# Chapter 3 - Running the Object Detection nodes

**URL:** <https://get-help.theconstruct.ai/t/chapter-3-running-the-object-detection-nodes/23538>\
**Category:** ROS2 Manipulation Basics\
**Created:** [April 5, 2023, 4:54am UTC](https://get-help.theconstruct.ai/t/chapter-3-running-the-object-detection-nodes/23538 "2023-04-05T04:54:59Z")\
**Posts on this page:** 1\
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**Author:** ![iisaac.saito](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/iisaac.saito/32/6413_2.png) [@iisaac.saito](https://get-help.theconstruct.ai/u/iisaac.saito)\
**Post date:** [April 23, 2023, 10:38am UTC](https://get-help.theconstruct.ai/t/chapter-3-running-the-object-detection-nodes/23538/3 "2023-04-23T10:38:33Z")

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I saw the similar/same error and asked [get-help.robotigniteacademy.com#23704](https://get-help.robotigniteacademy.com/t/manipulation-unit3-action-client-ends-up-w-undefined-symbol-rosidl-double-sequence-are-equal/23704/2). I’ve only found a workaround.

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_[View the full topic](https://get-help.theconstruct.ai/t/chapter-3-running-the-object-detection-nodes/23538)._