# Debug precompile warnings

**URL:** <https://discourse.julialang.org/t/debug-precompile-warnings/114222>\
**Category:** General Usage\
**Tags:** question\
**Created:** [May 14, 2024, 8:06am UTC](https://discourse.julialang.org/t/debug-precompile-warnings/114222 "2024-05-14T08:06:30Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ohmsweetohm1](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ohmsweetohm1/32/49126_2.png) [@ohmsweetohm1](https://discourse.julialang.org/u/ohmsweetohm1)\
**Post date:** [May 14, 2024, 8:06am UTC](https://discourse.julialang.org/t/debug-precompile-warnings/114222/1 "2024-05-14T08:06:30Z")

</div>

I’m seeing lots of precompile warnings like this:

```julia
Precompiling ComponentArraysAdaptExt
  1 dependency successfully precompiled in 6 seconds. 61 already precompiled.      
[Info: Precompiling ComponentArraysAdaptExt [790f4daf-a4cd-52c9-af90-2799ce9781e5]
┌ Warning: The call to compilecache failed to create a usable precompiled cache file for LabelledArrays [2ee39098-c373-598a-b85f-a56591580800]
│ exception = Required dependency RecursiveArrayTools [731186ca-8d62-57ce-b412-fbd966d074cd] failed to load from a cache file.
└ @ Base loading.jl:1992
[Info: Precompiling RecursiveArrayTools [731186ca-8d62-57ce-b412-fbd966d074cd]
┌ Warning: The call to compilecache failed to create a usable precompiled cache file for RecursiveArrayTools [731186ca-8d62-57ce-b412-fbd966d074cd]
│ exception = Error reading package image file.
└ @ Base loading.jl:1992

```

How can I debug this? I already deleted almost all of the `.julia` folder, it did not help.

---

<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:** [May 14, 2024, 8:19am UTC](https://discourse.julialang.org/t/debug-precompile-warnings/114222/2 "2024-05-14T08:19:06Z")

</div>

What is the output of:

```julia
versioninfo()

```

and what is the output of

```julia
using Pkg
Pkg.status()

```

---

<div class="post-metadata">

**Author:** ![kristoffer.carlsson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kristoffer.carlsson/32/22_2.png) [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Post date:** [May 14, 2024, 9:23am UTC](https://discourse.julialang.org/t/debug-precompile-warnings/114222/3 "2024-05-14T09:23:06Z")

</div>

There are some problems with the extension precompilation right now which may cause warnings like this to happen.

Hopefully [account for extensions indirectly depending on each other in parallel package precompilation by KristofferC · Pull Request #53972 · JuliaLang/julia · GitHub](https://github.com/JuliaLang/julia/pull/53972) should fix that. You can try with julia nightly.