# Problem of dependencies not found in TF 101 - Unit 2 and Unit 3

**URL:** <https://get-help.theconstruct.ai/t/problem-of-dependencies-not-found-in-tf-101-unit-2-and-unit-3/1230>\
**Category:** TF ROS 101\
**Created:** [October 28, 2019, 8:41am UTC](https://get-help.theconstruct.ai/t/problem-of-dependencies-not-found-in-tf-101-unit-2-and-unit-3/1230 "2019-10-28T08:41:29Z")\
**Posts on this page:** 1\
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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:** [October 28, 2019, 3:11pm UTC](https://get-help.theconstruct.ai/t/problem-of-dependencies-not-found-in-tf-101-unit-2-and-unit-3/1230/2 "2019-10-28T15:11:37Z")

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Thats an oddly strange issue. I just tried it here and no issue. Maybe there is something wrong in your catkin\_ws? Did you remove or compile something and gave error?  
Could you do the following:

> echo $ROS\_PACKAGE\_PATH

You should get this path:

> /home/user/catkin\_ws/src:/home/simulations/public\_sim\_ws/src:/opt/ros/kinetic/share

This allows the ros system to find all the packages.

Also, remove everything you have in the /home/user/catkin\_ws/src, (EXCEPT for the Cmakelitsts.txt ) , andtry to do:

> cd /homeUser/catkin\_ws; rm -rf build devel; source /home/simulations/public\_sim\_ws/devel/setup.bash; catkin\_make

This would reset the catkin\_ws with its original state, just in case, something went wrong in the comilation.

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