# Error in object detection- error in Running the Object Detection nodes

**URL:** <https://get-help.theconstruct.ai/t/error-in-object-detection-error-in-running-the-object-detection-nodes/21320>\
**Category:** ROS2 Manipulation Basics\
**Created:** [January 1, 2023, 9:13am UTC](https://get-help.theconstruct.ai/t/error-in-object-detection-error-in-running-the-object-detection-nodes/21320 "2023-01-01T09:13:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Scotvers](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/s/8797f3/32.png) [@Scotvers](https://get-help.theconstruct.ai/u/Scotvers)\
**Post date:** [January 1, 2023, 9:13am UTC](https://get-help.theconstruct.ai/t/error-in-object-detection-error-in-running-the-object-detection-nodes/21320/1 "2023-01-01T09:13:19Z")

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hello i have a problem in unit 3 ros2 manipulation perception, when i try to run this command :  
ros2 run simple\_grasping basic\_grasping\_perception\_node --ros-args -p debug\_topics:=true

i got an error like this :  
/home/user/ros2\_ws/install/simple\_grasping/lib/simple\_grasping/basic\_grasping\_perception\_node: symbol lookup error: /home/user/ros2\_ws/install/simple\_grasping/lib/simple\_grasping/basic\_grasping\_perception\_node: undefined symbol: \_ZNK12class\_loader11ClassLoader14getLibraryPathB5cxx11Ev

can anyone help me solve this?

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<div class="post-metadata">

**Author:** ![eyaleyal](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/e/838e76/32.png) [@eyaleyal](https://get-help.theconstruct.ai/u/eyaleyal)\
**Post date:** [January 8, 2023, 4:53pm UTC](https://get-help.theconstruct.ai/t/error-in-object-detection-error-in-running-the-object-detection-nodes/21320/2 "2023-01-08T16:53:45Z")

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did you find a solution? i’m facing the same error

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<div class="post-metadata">

**Author:** ![albertoezquerro](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/albertoezquerro/32/7031_2.png) [@albertoezquerro](https://get-help.theconstruct.ai/u/albertoezquerro)\
**Post date:** [January 9, 2023, 10:08am UTC](https://get-help.theconstruct.ai/t/error-in-object-detection-error-in-running-the-object-detection-nodes/21320/3 "2023-01-09T10:08:28Z")

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Hello @Scotvers @eyaleyal ,

That looks like a sourcing issue. Could you please try resetting your Shell (click on the red cross on the top-right corner of the Shell) and try running the following commands:

```auto
source /opt/ros/foxy/setup.bash
source ~/ros2_ws/install/setup.bash
ros2 run simple_grasping basic_grasping_perception_node --ros-args -p debug_topics:=true

```