# Question about precompile

**URL:** <https://discourse.julialang.org/t/question-about-precompile/81756>\
**Category:** General Usage\
**Created:** [May 27, 2022, 2:12am UTC](https://discourse.julialang.org/t/question-about-precompile/81756 "2022-05-27T02:12:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Raymond](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raymond/32/36557_2.png) [@Raymond](https://discourse.julialang.org/u/Raymond)\
**Post date:** [May 27, 2022, 2:12am UTC](https://discourse.julialang.org/t/question-about-precompile/81756/1 "2022-05-27T02:12:44Z")

</div>

Dear all,  
Why it always say “2 skipped during auto due to previous errors”. How to find which packages get error?

```julia
(576 already precompiled, 2 skipped during auto due to previous errors)

```

---

<div class="post-metadata">

**Author:** ![ianshmean](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ianshmean/32/216042_2.png) [@ianshmean](https://discourse.julialang.org/u/ianshmean)\
**Post date:** [May 27, 2022, 3:05am UTC](https://discourse.julialang.org/t/question-about-precompile/81756/2 "2022-05-27T03:05:49Z")

</div>

Run precompile manually to see what those are

```julia
pkg> precompile

```

More info [Julia 1.6 precompiling project, dependency skipped due to previous error - which one? - #4 by ianshmean](https://discourse.julialang.org/t/julia-1-6-precompiling-project-dependency-skipped-due-to-previous-error-which-one/53322/4)

---

<div class="post-metadata">

**Author:** ![Raymond](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raymond/32/36557_2.png) [@Raymond](https://discourse.julialang.org/u/Raymond)\
**Post date:** [May 27, 2022, 3:30am UTC](https://discourse.julialang.org/t/question-about-precompile/81756/3 "2022-05-27T03:30:20Z")

</div>

```julia
(@v1.7) pkg> precompile
Precompiling project...
  ✗ HDF5
  1 dependency successfully precompiled in 4 seconds (582 already precompiled)

```

---

<div class="post-metadata">

**Author:** ![Raymond](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raymond/32/36557_2.png) [@Raymond](https://discourse.julialang.org/u/Raymond)\
**Post date:** [May 27, 2022, 3:35am UTC](https://discourse.julialang.org/t/question-about-precompile/81756/4 "2022-05-27T03:35:26Z")

</div>

```julia

julia> using Pkg

julia> Pkg.build("HDF5")
    Building HDF5 → `~/.julia/scratchspaces/44cfe95a-1eb2-52ea-b672-e2afdf69b78f/698c099c6613d7b7f151832868728f426abe698b/build.log`
  Progress [>] 0/1
Precompiling project...
  1 dependency successfully precompiled in 2 seconds (582 already precompiled, 1 skipped during auto due to previous errors)

```