# Where to report error

**URL:** <https://discourse.julialang.org/t/where-to-report-error/100042>\
**Category:** General Usage\
**Tags:** question\
**Created:** [June 8, 2023, 8:12am UTC](https://discourse.julialang.org/t/where-to-report-error/100042 "2023-06-08T08:12:35Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Post date:** [June 8, 2023, 8:12am UTC](https://discourse.julialang.org/t/where-to-report-error/100042/1 "2023-06-08T08:12:35Z")

</div>

During precompilation I see this error:

```julia
┌ Warning: Module FileIOExt with build ID ffffffff-ffff-ffff-0000-02c424450fe9 is missing from the cache.
│ This may mean FileIOExt [f5f51d8f-5827-5d2e-939b-192fcd6ec70c] does not support precompilation but is imported by a module that does.
└ @ Base loading.jl:1793
┌ Error: Error during loading of extension FileIOExt of Plots, use `Base.retry_load_extensions()` to retry.
│ exception =
│ 1-element ExceptionStack:
│ Declaring __precompile__ (false) is not allowed in files that are being precompiled.
│ Stacktrace:
│ [1] _require(pkg::Base.PkgId, env::Nothing)
│ @ Base .\loading.jl:1797
│ [2] _require_prelocked(uuidkey::Base.PkgId, env::Nothing)
│ @ Base .\loading.jl:1660
│ [3] _require_prelocked(uuidkey::Base.PkgId)
│ @ Base .\loading.jl:1658
│ [4] run_extension_callbacks(extid::Base.ExtensionId)
│ @ Base .\loading.jl:1255
│ [5] run_extension_callbacks(pkgid::Base.PkgId)
│ @ Base .\loading.jl:1290
│ [6] run_package_callbacks(modkey::Base.PkgId)
│ @ Base .\loading.jl:1124
│ [7] _require_prelocked(uuidkey::Base.PkgId, env::String)
│ @ Base .\loading.jl:1667
│ [8] macro expansion
│ @ .\loading.jl:1648 [inlined]
│ [9] macro expansion
│ @ .\lock.jl:267 [inlined]
│ [10] require(into::Module, mod::Symbol)
│ @ Base .\loading.jl:1611
│ [11] include
│ @ .\Base.jl:457 [inlined]
│ [12] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::String)
│ @ Base .\loading.jl:2045
│ [13] top-level scope
│ @ stdin:3
│ [14] eval
│ @ .\boot.jl:370 [inlined]
│ [15] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
│ @ Base .\loading.jl:1899
│ [16] include_string
│ @ .\loading.jl:1909 [inlined]
│ [17] exec_options(opts::Base.JLOptions)
│ @ Base .\client.jl:305
│ [18] _start()
│ @ Base .\client.jl:522
└ @ Base loading.jl:1261

```

This happens when I added Plots and JLD2 to my project.

But in which package is the bug, is it Plots or JLD2 or FileIO?

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<div class="post-metadata">

**Author:** ![simsurace](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/simsurace/32/30216_2.png) [@simsurace](https://discourse.julialang.org/u/simsurace)\
**Post date:** [June 8, 2023, 8:26am UTC](https://discourse.julialang.org/t/where-to-report-error/100042/2 "2023-06-08T08:26:16Z")

</div>

I would report an issue to Plots.jl, since it’s its extension.

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<div class="post-metadata">

**Author:** ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Post date:** [June 8, 2023, 12:14pm UTC](https://discourse.julialang.org/t/where-to-report-error/100042/3 "2023-06-08T12:14:12Z")

</div>

> [@simsurace](#):
>
> I would report an issue to Plots.jl

Done: [Error during loading of extension FileIOExt of Plots · Issue #4767 · JuliaPlots/Plots.jl · GitHub](https://github.com/JuliaPlots/Plots.jl/issues/4767)