# Problem with precompiling NeuralPDE

**URL:** <https://discourse.julialang.org/t/problem-with-precompiling-neuralpde/72840>\
**Category:** New to Julia\
**Tags:** question, package, diffeq\
**Created:** [December 9, 2021, 5:29pm UTC](https://discourse.julialang.org/t/problem-with-precompiling-neuralpde/72840 "2021-12-09T17:29:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Physics\_Student](https://avatars.discourse-cdn.com/v4/letter/p/ccd318/32.png) [@Physics\_Student](https://discourse.julialang.org/u/Physics_Student)\
**Post date:** [December 9, 2021, 5:29pm UTC](https://discourse.julialang.org/t/problem-with-precompiling-neuralpde/72840/1 "2021-12-09T17:29:52Z")

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Hi together,

I want to use the package NeuralPDE. I use Windows 10 and Julia 1.4.0. When I want to precompile it (by “using NeuralPDE” , I get the following error message:

```julia
ERROR: LoadError: LoadError: UndefVarError: AbstractADType not defined

ERROR: LoadError: Failed to precompile GalacticOptim [a75be94c-b780-496d-a8a9-0878b188d577]

```

Failed to precompile NeuralPDE [315f7962-48a3-4962-8226-d0f33b1235f0]

Has anyone an idea of the problem I have there and how to solve is?

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<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [December 9, 2021, 5:52pm UTC](https://discourse.julialang.org/t/problem-with-precompiling-neuralpde/72840/2 "2021-12-09T17:52:50Z")

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Why are you using Julia 1.4? Current stable release is 1.7.

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<div class="post-metadata">

**Author:** ![goerch](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goerch/32/29122_2.png) [@goerch](https://discourse.julialang.org/u/goerch)\
**Post date:** [December 9, 2021, 6:27pm UTC](https://discourse.julialang.org/t/problem-with-precompiling-neuralpde/72840/3 "2021-12-09T18:27:28Z")

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Julia is moving pretty fast. L(ong) T(erm) S(upport) is 1.6.4 now, I know of packages, which reduce 1.0 support already.