# Internal Error: UndefVarError: \`includet\` not defined

**URL:** <https://discourse.julialang.org/t/internal-error-undefvarerror-includet-not-defined/103601>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [September 7, 2023, 6:31am UTC](https://discourse.julialang.org/t/internal-error-undefvarerror-includet-not-defined/103601 "2023-09-07T06:31:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ZhanHuijia](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/zhanhuijia/32/50620_2.png) [@ZhanHuijia](https://discourse.julialang.org/u/ZhanHuijia)\
**Post date:** [September 7, 2023, 6:31am UTC](https://discourse.julialang.org/t/internal-error-undefvarerror-includet-not-defined/103601/1 "2023-09-07T06:31:39Z")

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Internal Error: UndefVarError: `includet` not defined

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**Author:** ![barucden](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/barucden/32/26154_2.png) [@barucden](https://discourse.julialang.org/u/barucden)\
**Post date:** [September 7, 2023, 6:35am UTC](https://discourse.julialang.org/t/internal-error-undefvarerror-includet-not-defined/103601/2 "2023-09-07T06:35:06Z")

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> [@Please read: make it easier to help you](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757):
>
> Welcome to the Julia Discourse! We are enthusiastic about helping Julia programmers, both beginner and experienced. This public service announcement (PSA) outlines best practices when asking for help. Following these points makes it easier for us to help you and more likely you’ll get a prompt, useful answer. Keywords are highlighted to make it easier to refer to specific points. Choose a descriptive title that captures the key part of your question, eg “plots with multiple axes” instead of …

`using Revise`

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**Author:** ![frylock](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/frylock/32/50213_2.png) [@frylock](https://discourse.julialang.org/u/frylock)\
**Post date:** [September 7, 2023, 12:32pm UTC](https://discourse.julialang.org/t/internal-error-undefvarerror-includet-not-defined/103601/3 "2023-09-07T12:32:34Z")

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Welcome to Julia Discourse!  
The error is because your code is likely assuming that you have the [Revise.jl](https://timholy.github.io/Revise.jl/stable/) package installed, if you follow the link, it will show you how to add the package.