# Get boundary coordinates

**URL:** <https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522>\
**Category:** dolfinx\
**Created:** [June 15, 2023, 11:42am UTC](https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522 "2023-06-15T11:42:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Nisu](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@Nisu](https://fenicsproject.discourse.group/u/Nisu)\
**Post date:** [June 15, 2023, 11:42am UTC](https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522/1 "2023-06-15T11:42:50Z")

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Hi, I was trying this code, and I am getting the following error. Could anyone help me with this?  
Thank you in advance!

```auto
facets = dolfinx.mesh.exterior_facet_indices(mesh.topology)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
Input In [15], in <cell line: 1>()
----> 1 facets = dolfinx.mesh.exterior_facet_indices(mesh.topology)

AttributeError: module 'dolfinx.mesh' has no attribute 'exterior_facet_indices'

```

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**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\
**Post date:** [June 15, 2023, 12:58pm UTC](https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522/2 "2023-06-15T12:58:02Z")

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What dolfinx version are you using?

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<div class="post-metadata">

**Author:** ![Nisu](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@Nisu](https://fenicsproject.discourse.group/u/Nisu)\
**Post date:** [June 15, 2023, 1:22pm UTC](https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522/3 "2023-06-15T13:22:15Z")

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My version is 0.4.1.0

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<div class="post-metadata">

**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\
**Post date:** [June 15, 2023, 1:52pm UTC](https://fenicsproject.discourse.group/t/get-boundary-coordinates/11522/4 "2023-06-15T13:52:47Z")

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That function does not exist in 0.4 versions. See: [Error execcting a command from the tutorial - #2 by bhaveshshrimali](https://fenicsproject.discourse.group/t/error-execcting-a-command-from-the-tutorial/8787/2) for the old syntax