# Run parrallel computing code

**URL:** <https://discourse.julialang.org/t/run-parrallel-computing-code/106645>\
**Category:** Performance\
**Tags:** question, package\
**Created:** [November 23, 2023, 6:05pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645 "2023-11-23T18:05:03Z")\
**Posts on this page:** 11\
**Page:** 1

<div class="post-metadata">

**Author:** ![Somali10](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/somali10/32/204194_2.png) [@Somali10](https://discourse.julialang.org/u/Somali10)\
**Post date:** [November 23, 2023, 6:05pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/1 "2023-11-23T18:05:04Z")

</div>

I have met this issue when I need to run the Performance Overview code  
GitError(Code:ENOTFOUND, Class:Config, config value ‘safe.directory’ was not found) Stacktrace: [1] macro expansion @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\error.jl:111](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/LibGit2/src/error.jl:111) [inlined] [2] LibGit2.GitRepo(path::String) @ LibGit2 [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\repository.jl:11](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/LibGit2/src/repository.jl:11) [3] #ensure\_clone#2 @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:72](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/GitTools.jl:72) [inlined] [4] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec) @ Pkg.Types [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/Types.jl:752) [5] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}) @ Pkg.Types [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/Types.jl:822) [6] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, IJulia.IJuliaStdio{Base.PipeEndpoint}, Tuple{Symbol}, NamedTuple{(:io,), Tuple{IJulia.IJuliaStdio{Base.PipeEndpoint}}}}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:255) [7] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::IJulia.IJuliaStdio{Base.PipeEndpoint}, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:156) [8] add(pkgs::Vector{Pkg.Types.PackageSpec}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:145) [9] #add#24 @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:143) [inlined] [10] add(pkg::Pkg.Types.PackageSpec) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:143) [11] top-level scope @ In[2]:1  
could anyone help me ?

thanks

---

<div class="post-metadata">

**Author:** ![filchristou](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/filchristou/32/26760_2.png) [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Post date:** [November 23, 2023, 6:19pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/2 "2023-11-23T18:19:46Z")

</div>

Hey, welcome to Julia discourse !

Can you be a bit more specific ?  
What is the “Performance Overview code” ? 😅  
Also, how did you try to “run” it ? Show us some code !

---

<div class="post-metadata">

**Author:** ![Somali10](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/somali10/32/204194_2.png) [@Somali10](https://discourse.julialang.org/u/Somali10)\
**Post date:** [November 23, 2023, 6:24pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/3 "2023-11-23T18:24:15Z")

</div>

so sorry 😅 I am doing Parallel Computing course

code:

import Pkg; Pkg.add(Pkg.PackageSpec(url=“[GitHub - JuliaAcademy/JuliaAcademyData.jl: Supplementary materials for Julia Academy courses](https://github.com/JuliaComputing/JuliaAcademyData.jl)”))

using JuliaAcademyData; activate(“Parallel\_Computing”)  
i found this issue :  
GitError(Code:ENOTFOUND, Class:Config, config value ‘safe.directory’ was not found) Stacktrace: [1] macro expansion @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\error.jl:111](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/LibGit2/src/error.jl:111) [inlined] [2] LibGit2.GitRepo(path::String) @ LibGit2 [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\repository.jl:11](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/LibGit2/src/repository.jl:11) [3] #ensure\_clone#2 @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:72](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/GitTools.jl:72) [inlined] [4] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec) @ Pkg.Types [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/Types.jl:752) [5] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}) @ Pkg.Types [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/Types.jl:822) [6] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, VSCodeServer.IJuliaCore.IJuliaStdio{Base.PipeEndpoint, typeof(VSCodeServer.io\_send\_callback)}, Tuple{Symbol}, NamedTuple{(:io,), Tuple{VSCodeServer.IJuliaCore.IJuliaStdio{Base.PipeEndpoint, typeof(VSCodeServer.io\_send\_callback)}}}}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:255) [7] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::VSCodeServer.IJuliaCore.IJuliaStdio{Base.PipeEndpoint, typeof(VSCodeServer.io\_send\_callback)}, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:156) [8] add(pkgs::Vector{Pkg.Types.PackageSpec}) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:145) [9] #add#24 @ [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:143) [inlined] [10] add(pkg::Pkg.Types.PackageSpec) @ Pkg.API [C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143](file:///C:/Users/profe/AppData/Local/Programs/Julia-1.9.4/share/julia/stdlib/v1.9/Pkg/src/API.jl:143) [11] top-level scope @ [c:\Users\profe\Downloads\015](file:///C:/Users/profe/Downloads/015) Julia is fast (1).ipynb:1

---

<div class="post-metadata">

**Author:** ![filchristou](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/filchristou/32/26760_2.png) [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Post date:** [November 23, 2023, 6:26pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/4 "2023-11-23T18:26:50Z")

</div>

try with the exact github url 🙂

```julia
julia> import Pkg; Pkg.add(url="https://github.com/JuliaAcademy/JuliaAcademyData.jl")

```

---

<div class="post-metadata">

**Author:** ![Somali10](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/somali10/32/204194_2.png) [@Somali10](https://discourse.julialang.org/u/Somali10)\
**Post date:** [November 23, 2023, 6:28pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/5 "2023-11-23T18:28:41Z")

</div>

i got this ERROR: invalid git HEAD (reference ‘refs/heads/master’ not found)  
Stacktrace:  
[1] pkgerror(msg::String)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:69  
[2] check\_valid\_HEAD(repo::LibGit2.GitRepo)  
@ Pkg.GitTools C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:342  
[3] (::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String})(repo::LibGit2.GitRepo)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:754  
[4] with(f::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String}, obj::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\types.jl:1160  
[5] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752  
[6] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822  
[7] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, Base.TTY, Tuple{Symbol}, NamedTuple{(:io,), Tuple{Base.TTY}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255  
[8] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::Base.TTY, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156  
[9] add(pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145  
[10] #add#24  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[11] add  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[12] add(; name::Nothing, uuid::Nothing, version::Nothing, url::String, rev::Nothing, path::Nothing, mode::Pkg.Types.PackageMode, subdir::Nothing, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:173  
[13] top-level scope  
@ REPL[2]:1

caused by: GitError(Code:EUNBORNBRANCH, Class:Reference, reference ‘refs/heads/master’ not found)  
Stacktrace:  
[1] macro expansion  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\error.jl:111 [inlined]  
[2] head(repo::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\reference.jl:44  
[3] check\_valid\_HEAD(repo::LibGit2.GitRepo)  
@ Pkg.GitTools C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:340  
[4] (::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String})(repo::LibGit2.GitRepo)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:754  
[5] with(f::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String}, obj::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\types.jl:1160  
[6] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752  
[7] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822  
[8] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, Base.TTY, Tuple{Symbol}, NamedTuple{(:io,), Tuple{Base.TTY}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255  
[9] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::Base.TTY, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156  
[10] add(pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145  
[11] #add#24  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[12] add  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[13] add(; name::Nothing, uuid::Nothing, version::Nothing, url::String, rev::Nothing, path::Nothing, mode::Pkg.Types.PackageMode, subdir::Nothing, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:173  
[14] top-level scope  
@ REPL[2]:1

---

<div class="post-metadata">

**Author:** ![filchristou](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/filchristou/32/26760_2.png) [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Post date:** [November 23, 2023, 6:36pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/6 "2023-11-23T18:36:50Z")

</div>

are you sure you run the code exactly as showed ?

Try also with

```julia
julia> Pkg.add(url="https://github.com/JuliaAcademy/JuliaAcademyData.jl", rev="main")

```

---

<div class="post-metadata">

**Author:** ![Somali10](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/somali10/32/204194_2.png) [@Somali10](https://discourse.julialang.org/u/Somali10)\
**Post date:** [November 23, 2023, 6:40pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/7 "2023-11-23T18:40:18Z")

</div>

Yes but I got again this

ERROR: invalid git HEAD (reference ‘refs/heads/master’ not found)  
Stacktrace:  
[1] pkgerror(msg::String)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:69  
[2] check\_valid\_HEAD(repo::LibGit2.GitRepo)  
@ Pkg.GitTools C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:342  
[3] (::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String})(repo::LibGit2.GitRepo)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:754  
[4] with(f::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String}, obj::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\types.jl:1160  
[5] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752  
[6] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822  
[7] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, Base.TTY, Tuple{Symbol}, NamedTuple{(:io,), Tuple{Base.TTY}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255  
[8] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::Base.TTY, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156  
[9] add(pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145  
[10] #add#24  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[11] add  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[12] add(; name::Nothing, uuid::Nothing, version::Nothing, url::String, rev::String, path::Nothing, mode::Pkg.Types.PackageMode, subdir::Nothing, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:173  
[13] top-level scope  
@ REPL[3]:1

caused by: GitError(Code:EUNBORNBRANCH, Class:Reference, reference ‘refs/heads/master’ not found)  
Stacktrace:  
[1] macro expansion  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\error.jl:111 [inlined]  
[2] head(repo::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\reference.jl:44  
[3] check\_valid\_HEAD(repo::LibGit2.GitRepo)  
@ Pkg.GitTools C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\GitTools.jl:340  
[4] (::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String})(repo::LibGit2.GitRepo)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:754  
[5] with(f::Pkg.Types.var"#57#58"{Pkg.Types.Context, Pkg.Types.PackageSpec, String}, obj::LibGit2.GitRepo)  
@ LibGit2 C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\LibGit2\src\types.jl:1160  
[6] handle\_repo\_add!(ctx::Pkg.Types.Context, pkg::Pkg.Types.PackageSpec)  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:752  
[7] handle\_repos\_add!(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.Types C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\Types.jl:822  
[8] add(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; preserve::Pkg.Types.PreserveLevel, platform::Base.BinaryPlatforms.Platform, kwargs::Base.Pairs{Symbol, Base.TTY, Tuple{Symbol}, NamedTuple{(:io,), Tuple{Base.TTY}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:255  
[9] add(pkgs::Vector{Pkg.Types.PackageSpec}; io::Base.TTY, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:156  
[10] add(pkgs::Vector{Pkg.Types.PackageSpec})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:145  
[11] #add#24  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[12] add  
@ C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:143 [inlined]  
[13] add(; name::Nothing, uuid::Nothing, version::Nothing, url::String, rev::String, path::Nothing, mode::Pkg.Types.PackageMode, subdir::Nothing, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})  
@ Pkg.API C:\Users\profe\AppData\Local\Programs\Julia-1.9.4\share\julia\stdlib\v1.9\Pkg\src\API.jl:173  
[14] top-level scope  
@ REPL[3]:1

---

<div class="post-metadata">

**Author:** ![mkitti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mkitti/32/12459_2.png) [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Post date:** [November 23, 2023, 6:49pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/8 "2023-11-23T18:49:35Z")

</div>

Your local clones directory appears to have been corrupted. Try wiping out the clones directory in your `JULIA_DEPOT_PATH`.

```julia
rm -rf ~/.julia/clones

```

---

<div class="post-metadata">

**Author:** ![Somali10](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/somali10/32/204194_2.png) [@Somali10](https://discourse.julialang.org/u/Somali10)\
**Post date:** [November 23, 2023, 6:52pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/9 "2023-11-23T18:52:16Z")

</div>

I got this  
ERROR: syntax: “/” is not a unary operator  
Stacktrace:  
[1] top-level scope  
@ none:1

---

<div class="post-metadata">

**Author:** ![mkitti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mkitti/32/12459_2.png) [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Post date:** [November 23, 2023, 6:59pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/10 "2023-11-23T18:59:06Z")

</div>

That’s a UNIX shell command. I see now that you are on Windows. Just delete the folder `C:\Users\<username>\.julia\clones`.

---

<div class="post-metadata">

**Author:** ![mkitti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mkitti/32/12459_2.png) [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Post date:** [November 23, 2023, 7:01pm UTC](https://discourse.julialang.org/t/run-parrallel-computing-code/106645/11 "2023-11-23T19:01:38Z")

</div>

You can do this in Julia for a similar effect.

```julia-repl
julia> rm(joinpath(DEPOT_PATH[1], "clones"); recursive=true)

```