# FFTW warnings in Travis

**URL:** <https://discourse.julialang.org/t/fftw-warnings-in-travis/9448>\
**Category:** General Usage\
**Tags:** question, ci\
**Created:** [March 2, 2018, 10:39am UTC](https://discourse.julialang.org/t/fftw-warnings-in-travis/9448 "2018-03-02T10:39:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yakir12](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yakir12/32/297_2.png) [@yakir12](https://discourse.julialang.org/u/yakir12)\
**Post date:** [March 2, 2018, 10:39am UTC](https://discourse.julialang.org/t/fftw-warnings-in-travis/9448/1 "2018-03-02T10:39:56Z")

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These are only warnings, but I was wondering if anyone has a remedy for this, or should I just ignore it:

```julia
WARNING: --output requested, but no modules defined during run
WARNING: The call to compilecache failed to create a usable precompiled cache file for module FFTW. Got:
WARNING: Cache file "/home/travis/.julia/lib/v0.6/FFTW.ji" not found.
WARNING: eval from module Main to ImageCore:    
Expr(:call, Expr(:., :Base, :include_from_node1)::Any, "/home/travis/.julia/v0.6/FFTW/src/FFTW.jl")::Any
  **incremental compilation may be broken for this module**

```

---

<div class="post-metadata">

**Author:** ![Gnimuc](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gnimuc/32/2194_2.png) [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)\
**Post date:** [March 2, 2018, 12:47pm UTC](https://discourse.julialang.org/t/fftw-warnings-in-travis/9448/2 "2018-03-02T12:47:02Z")

</div>

[https://github.com/JuliaMath/FFTW.jl/issues/46](https://github.com/JuliaMath/FFTW.jl/issues/46)

I think it’s unharmful, you can just ignore it.