# Error in Pkg EEG

**URL:** <https://discourse.julialang.org/t/error-in-pkg-eeg/59799>\
**Category:** General Usage\
**Created:** [April 22, 2021, 12:20pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799 "2021-04-22T12:20:30Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Xzarx](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xzarx/32/24274_2.png) [@Xzarx](https://discourse.julialang.org/u/Xzarx)\
**Post date:** [April 22, 2021, 12:20pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799/1 "2021-04-22T12:20:30Z")

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I tries to use the package EGG, but, when I run the command: Pkg.add(“EEG”)  
(@v1.5) pkg\> Pkg.checkout(“EEG”)  
ERROR: Could not determine command

julia\> Pkg.checkout(“EEG”)  
ERROR: UndefVarError: checkout not defined  
Stacktrace:  
[1] getproperty(::Module, ::Symbol) at .\Base.jl:26  
[2] top-level scope at none:1

julia\> Pkg.add(“EEG”)  
ERROR: The following package names could not be resolved:

- EEG (not found in project, manifest or registry)

Stacktrace:  
[1] pkgerror(::String) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:52  
[2] ensure\_resolved(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; registry::Bool) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:837  
[3] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:177  
[4] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:139  
[5] #add#21 at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]  
[6] add at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]  
[7] #add#20 at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]  
[8] add at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]  
[9] add(::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65  
[10] add(::String) at C:\buildbot\worker\package\_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65  
[11] top-level scope at none:1  
What should I do to install this package ? (autism spectrum disorder)

Thanks a lot !

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<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [April 22, 2021, 12:47pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799/2 "2021-04-22T12:47:51Z")

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Related: [EEG.jl -\> Present and Future](https://discourse.julialang.org/t/eeg-jl-present-and-future/44936)

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<div class="post-metadata">

**Author:** ![Xzarx](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xzarx/32/24274_2.png) [@Xzarx](https://discourse.julialang.org/u/Xzarx)\
**Post date:** [April 22, 2021, 12:51pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799/3 "2021-04-22T12:51:08Z")

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I read this topic, but did not find anything useful

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<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [April 22, 2021, 12:53pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799/4 "2021-04-22T12:53:41Z")

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Fair enough, in that case your next best bet is to read the package manager documentation:

[https://pkgdocs.julialang.org/v1/managing-packages/#Adding-packages](https://pkgdocs.julialang.org/v1/managing-packages/#Adding-packages)

Specifically around adding unregistered packages (EEG is not available in the general registry). `Pkg.checkout` I believe has been removed since pre-1.0 days, so the readme of EEG is probably quite outdated. Also, don’t use the `Pkg.xxx` API when interacting with the package manager from within the package REPL, these are two separate ways of using `Pkg`.

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<div class="post-metadata">

**Author:** ![Xzarx](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xzarx/32/24274_2.png) [@Xzarx](https://discourse.julialang.org/u/Xzarx)\
**Post date:** [April 22, 2021, 12:55pm UTC](https://discourse.julialang.org/t/error-in-pkg-eeg/59799/5 "2021-04-22T12:55:48Z")

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Thanks for the advice. I will look for an alternative at [Julia Neuro by JuliaNeuro](https://julianeuro.github.io/packages)