# Dolfinx install

**URL:** <https://fenicsproject.discourse.group/t/dolfinx-install/6831>\
**Category:** installation\
**Created:** [October 15, 2021, 3:56pm UTC](https://fenicsproject.discourse.group/t/dolfinx-install/6831 "2021-10-15T15:56:34Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\
**Post date:** [October 15, 2021, 3:56pm UTC](https://fenicsproject.discourse.group/t/dolfinx-install/6831/1 "2021-10-15T15:56:34Z")

</div>

Dear all,  
After dolfinx installation, I import dolfinx and an error is “libdolfinx.so.0.1: undefined symbol: \_ZN5basix4cell11type\_to\_strB5cxx11ENS0\_4typeE”. Can anyone help me? Thanks

---

<div class="post-metadata">

**Author:** ![nate](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/nate/32/17_2.png) [@nate](https://fenicsproject.discourse.group/u/nate)\
**Post date:** [October 15, 2021, 4:33pm UTC](https://fenicsproject.discourse.group/t/dolfinx-install/6831/2 "2021-10-15T16:33:27Z")

</div>

Make sure your installed version of `basix` is up to date. You can use `ldd libdolfinx.so` to make sure it’s linked to the correct version.

E.g:

```bash
ldd libdolfinx.so

```

Shows me

```auto
...
	libbasix.so => $HOME/local/lib/libbasix.so (0x00007fcff599b000)
...

```

which I know is correct for my system.

---

<div class="post-metadata">

**Author:** ![wwshunan](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/wwshunan/32/852_2.png) [@wwshunan](https://fenicsproject.discourse.group/u/wwshunan)\
**Post date:** [October 16, 2021, 4:09am UTC](https://fenicsproject.discourse.group/t/dolfinx-install/6831/3 "2021-10-16T04:09:21Z")

</div>

> [@nate](#):
>
> ct for my system.

Dear nate,  
I installed the older commit #980 which doesn’t need basix and it’s the problem caused by the residue left by the uninstallation of the newest dolfinx commit