# CI Failing due to not having a package installed

**URL:** <https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463>\
**Category:** General Usage\
**Created:** [March 30, 2026, 2:33pm UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463 "2026-03-30T14:33:34Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Mitch\_Phillipson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mitch_phillipson/32/42883_2.png) [@Mitch\_Phillipson](https://discourse.julialang.org/u/Mitch_Phillipson)\
**Post date:** [March 30, 2026, 2:33pm UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463/1 "2026-03-30T14:33:34Z")

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Hello,

I have a package running a suite of tests on a few different Julia versions and OSs. I am getting a strange error on `Julia-nightly - Windows-latest`:

```julia
ERROR: LoadError: ArgumentError: Package DataFrames [a93c6f00-e57d-5684-b7b6-d8193f3e46c0] is required but does not seem to be installed:
 - Run `Pkg.instantiate()` to install all recorded dependencies.

```

A similar error is occurring on `Julia 1.10 - Windows-latest`, except with `MacroTools.jl` and `JuMP.jl`.

The same tests are passing on all other Julia versions and OSs.

[Link to failing tests](https://github.com/julia-mpsge/MPSGE.jl/actions/runs/23562673495/job/69188505387?pr=229)

The `Project.toml` contains all necessary dependencies (including `DataFrames.jl` and `JuMP.jl`) and the tests pass locally.

Any ideas what could be causing this issue?

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**Author:** ![obsidianjulua](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/obsidianjulua/32/221495_2.png) [@obsidianjulua](https://discourse.julialang.org/u/obsidianjulua)\
**Post date:** [March 30, 2026, 5:32pm UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463/2 "2026-03-30T17:32:31Z")

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The project toml has dataframes for v1.6.1

try relaxing the version to “1” and re-running the registration.

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**Author:** ![Mitch\_Phillipson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mitch_phillipson/32/42883_2.png) [@Mitch\_Phillipson](https://discourse.julialang.org/u/Mitch_Phillipson)\
**Post date:** [March 30, 2026, 6:15pm UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463/3 "2026-03-30T18:15:11Z")

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This was updated in a commit a few days ago DataFrames to v1.8. The results are the same, unfortunately.

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**Author:** ![jd-foster](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jd-foster/32/35824_2.png) [@jd-foster](https://discourse.julialang.org/u/jd-foster)\
**Post date:** [April 1, 2026, 6:13am UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463/4 "2026-04-01T06:13:14Z")

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Seems like it’s back to passing again? Do you know what changed?

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<div class="post-metadata">

**Author:** ![Mitch\_Phillipson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mitch_phillipson/32/42883_2.png) [@Mitch\_Phillipson](https://discourse.julialang.org/u/Mitch_Phillipson)\
**Post date:** [April 1, 2026, 10:47am UTC](https://discourse.julialang.org/t/ci-failing-due-to-not-having-a-package-installed/136463/5 "2026-04-01T10:47:23Z")

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This issue was a GitHub caching issue. Deleting the caches solved the issue.