# 404 Not Found Link in "Introduction to scvi-tools" walkthrough

**URL:** <https://discourse.scverse.org/t/404-not-found-link-in-introduction-to-scvi-tools-walkthrough/1506>\
**Category:** scvi-tools\
**Tags:** scvi\
**Created:** [June 12, 2023, 3:12am UTC](https://discourse.scverse.org/t/404-not-found-link-in-introduction-to-scvi-tools-walkthrough/1506 "2023-06-12T03:12:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bakar](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bakar](https://discourse.scverse.org/u/Bakar)\
**Post date:** [June 12, 2023, 3:12am UTC](https://discourse.scverse.org/t/404-not-found-link-in-introduction-to-scvi-tools-walkthrough/1506/1 "2023-06-12T03:12:51Z")

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Underneath “[Introduction to scvi-tools](https://docs.scvi-tools.org/en/stable/tutorials/notebooks/api_overview.html)” subsection “Loading and preparing data”:

" Now we preprocess the data to remove, for example, genes that are very lowly expressed and other outliers. For these tasks we prefer the [Scanpy preprocessing module](https://scanpy.readthedocs.io/en/stable/api/index.html#module-scanpy.pp)."

The link sends someone to a 404 page

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**Author:** ![martinkim0](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.scverse.org/martinkim0/32/881_2.png) [@martinkim0](https://discourse.scverse.org/u/martinkim0)\
**Post date:** [June 12, 2023, 5:36pm UTC](https://discourse.scverse.org/t/404-not-found-link-in-introduction-to-scvi-tools-walkthrough/1506/2 "2023-06-12T17:36:39Z")

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Thanks for bringing up this issue, we’ll get this fixed!