# Precompilation of package extension failure

**URL:** <https://discourse.julialang.org/t/precompilation-of-package-extension-failure/103983>\
**Category:** General Usage\
**Tags:** package-extensions, graph\
**Created:** [September 18, 2023, 1:10pm UTC](https://discourse.julialang.org/t/precompilation-of-package-extension-failure/103983 "2023-09-18T13:10:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![abelsiqueira](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/abelsiqueira/32/47269_2.png) [@abelsiqueira](https://discourse.julialang.org/u/abelsiqueira)\
**Post date:** [September 18, 2023, 1:10pm UTC](https://discourse.julialang.org/t/precompilation-of-package-extension-failure/103983/1 "2023-09-18T13:10:16Z")

</div>

I have the following error when adding `GraphIO` and `ParserCombinator` in a brand new Julia 1.9.3 Linux installation:

```julia
Warning: Module GraphIOGMLExt with build ID ffffffff-ffff-ffff-0000-177dba44e6bc is missing from the cache.
│ │ This may mean GraphIOGMLExt [10735248-2040-59e9-9abe-fdd6b710d968] does not support precompilation but is imported by a module that does.
│ └ @ Base loading.jl:1793
│ ┌ Error: Error during loading of extension GraphIOGMLExt of GraphIO, use `Base.retry_load_extensions()` to retry.
...

```

I’ve opened an issue to track it there: [Precompilation error with ParserCombinator · Issue #56 · JuliaGraphs/GraphIO.jl · GitHub](https://github.com/JuliaGraphs/GraphIO.jl/issues/56)

There is a similar error with a different package combination [here](https://discourse.julialang.org/t/error-while-installing-dataframes/103781). Maybe it’s related?