# Node selection is not allowed

**URL:** <https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012>\
**Category:** Solid Mechanics / FEA\
**Created:** [January 31, 2024, 10:05pm UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012 "2024-01-31T22:05:15Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Youssef\_Samir](https://www.simscale.com/forum/letter_avatar/youssef_samir/32/5_5575768a8748004e209b776fc1b2916d.png) [@Youssef\_Samir](https://www.simscale.com/forum/u/Youssef_Samir)\
**Post date:** [January 31, 2024, 10:05pm UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012/1 "2024-01-31T22:05:15Z")

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Hello  
I am working on a project which is FEA on a drone arm and I want to apply a fixed value boundary condition on a node but the node button is greyed and I can not select it, so what is the problem?

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**Author:** ![anon77415598](https://www.simscale.com/forum/letter_avatar/anon77415598/32/5_5575768a8748004e209b776fc1b2916d.png) [@anon77415598](https://www.simscale.com/forum/u/anon77415598)\
**Post date:** [January 31, 2024, 10:49pm UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012/2 "2024-01-31T22:49:43Z")

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Hi @Youssef_Samir,

Could you please post the project link here? Also a screenshot of the error would be helpful.

best,

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**Author:** ![Youssef\_Samir](https://www.simscale.com/forum/letter_avatar/youssef_samir/32/5_5575768a8748004e209b776fc1b2916d.png) [@Youssef\_Samir](https://www.simscale.com/forum/u/Youssef_Samir)\
**Post date:** [February 3, 2024, 7:17am UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012/3 "2024-02-03T07:17:43Z")

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Here is the project link

> **[SimScale Login](https://www.simscale.com/workbench/?pid=4103148089896384813&mi=spec%3A24a6469f-f291-4d57-8f0f-f5eb4e624fc1%2Cservice%3ASIMULATION%2Cstrategy%3A2)**
>
> Log in to your SimScale account. SimScale makes high-fidelity engineering simulation technically and economically accessible. At any scale. In the cloud.

 ![Static analysis test 1 _ SimScale Workbench - Google Chrome 2_3_2024 9_09_44 AM](https://www.simscale.com/forum/uploads/default/original/3X/b/4/b49802bbf85c31972d4523290b1b14feb08b8579.png)

As you can see the node selection option is greyed and I can’t choose it, I want to make a boundary condition at the node I point to.

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**Author:** ![anon77415598](https://www.simscale.com/forum/letter_avatar/anon77415598/32/5_5575768a8748004e209b776fc1b2916d.png) [@anon77415598](https://www.simscale.com/forum/u/anon77415598)\
**Post date:** [February 3, 2024, 7:27pm UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012/4 "2024-02-03T19:27:13Z")

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Got it, thanks for the link. Unfortunately [mesh upload](https://www.simscale.com/docs/simulation-setup/meshing/mesh-upload/) is mandatory if _Node selection_ needs to be used, being not possible to use it for uploaded geometries.

best,

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**Author:** ![Youssef\_Samir](https://www.simscale.com/forum/letter_avatar/youssef_samir/32/5_5575768a8748004e209b776fc1b2916d.png) [@Youssef\_Samir](https://www.simscale.com/forum/u/Youssef_Samir)\
**Post date:** [February 6, 2024, 5:02pm UTC](https://www.simscale.com/forum/t/node-selection-is-not-allowed/98012/5 "2024-02-06T17:02:27Z")

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Thank you so much.