# Error message on julia travis: symbol lookup error: MbedTLS undefined symbol

**URL:** <https://discourse.julialang.org/t/error-message-on-julia-travis-symbol-lookup-error-mbedtls-undefined-symbol/20317>\
**Category:** General Usage\
**Tags:** travis\
**Created:** [January 31, 2019, 3:19pm UTC](https://discourse.julialang.org/t/error-message-on-julia-travis-symbol-lookup-error-mbedtls-undefined-symbol/20317 "2019-01-31T15:19:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![konkam](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/konkam/32/6598_2.png) [@konkam](https://discourse.julialang.org/u/konkam)\
**Post date:** [January 31, 2019, 3:19pm UTC](https://discourse.julialang.org/t/error-message-on-julia-travis-symbol-lookup-error-mbedtls-undefined-symbol/20317/1 "2019-01-31T15:19:32Z")

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Hello,

I am currently getting an error on Travis that I cannot reproduce on my computer. All tests seem to pass, but the build on Travis finishes with:

`julia: symbol lookup error: /home/travis/.julia/packages/MbedTLS/XkQiX/deps/usr/lib/libmbedtls.so: undefined symbol: mbedtls_x509_crt_verify_restartable`

The full build report is available here: [Travis CI - Test and Deploy Your Code with Confidence](https://travis-ci.org/konkam/FeynmanKacParticleFilters.jl/builds/486975452)

I have tried updating all the packages in the Project.toml and Manifest.toml, but this did not solve the problem.

The yaml file is minimalist and should not cause problems:

```julia
language: julia
os:
  - linux
julia:
  - 1.0
  - 1.1
codecov: true
coveralls: true

```

Do you have any idea on how to go at the problem ?

Many thanks

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**Author:** ![tkoolen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkoolen/32/1603_2.png) [@tkoolen](https://discourse.julialang.org/u/tkoolen)\
**Post date:** [January 31, 2019, 5:11pm UTC](https://discourse.julialang.org/t/error-message-on-julia-travis-symbol-lookup-error-mbedtls-undefined-symbol/20317/2 "2019-01-31T17:11:36Z")

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See [https://github.com/JuliaWeb/MbedTLS.jl/issues/193](https://github.com/JuliaWeb/MbedTLS.jl/issues/193). It’s broken for everybody.

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**Author:** ![konkam](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/konkam/32/6598_2.png) [@konkam](https://discourse.julialang.org/u/konkam)\
**Post date:** [January 31, 2019, 6:02pm UTC](https://discourse.julialang.org/t/error-message-on-julia-travis-symbol-lookup-error-mbedtls-undefined-symbol/20317/3 "2019-01-31T18:02:40Z")

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Thanks for the reply !