# some question about Ipopt package

**URL:** <https://discourse.julialang.org/t/some-question-about-ipopt-package/10150>\
**Category:** Performance\
**Created:** [April 4, 2018, 4:43am UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150 "2018-04-04T04:43:03Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Jelly](https://avatars.discourse-cdn.com/v4/letter/j/a87d85/32.png) [@Jelly](https://discourse.julialang.org/u/Jelly)\
**Post date:** [April 4, 2018, 4:43am UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/1 "2018-04-04T04:43:03Z")

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After i install Ipopt for Julia , when i execute Pkg.test(“Ipopt”) , it come errors with  
\*\*

ERROR: LoadError: UndefVarError: use\_BinaryProvider not defined  
ERROR: LoadError: Failed to precompile Ipopt to d:\JuliaPro-0.6.2.2\pkgs-0.6.2.2\lib\v0.6\Ipopt.ji.

\*\*  
how to resolve this ??

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**Author:** ![kristoffer.carlsson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kristoffer.carlsson/32/22_2.png) [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Post date:** [April 4, 2018, 11:12am UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/2 "2018-04-04T11:12:27Z")

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Looks like you haven’t build the package. Try `Pkg.build("Ipopt")`.

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**Author:** ![Juser](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@Juser](https://discourse.julialang.org/u/Juser)\
**Post date:** [April 4, 2018, 10:55pm UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/3 "2018-04-04T22:55:57Z")

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Also as a general piece of advice for installing Ipopt: make sure you have all of the dependencies.

[https://www.coin-or.org/Ipopt/documentation/node11.html](https://www.coin-or.org/Ipopt/documentation/node11.html)

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**Author:** ![Jelly](https://avatars.discourse-cdn.com/v4/letter/j/a87d85/32.png) [@Jelly](https://discourse.julialang.org/u/Jelly)\
**Post date:** [April 5, 2018, 12:35pm UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/4 "2018-04-05T12:35:14Z")

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When i try to build the Ipopt package ,it comes with:

WARNING: DecFP and Ipopt had build errors.

- packages with build errors remain installed in d:\JuliaPro-0.6.2.2\pkgs-0.6.2.2\v0.6
- build the package(s) and all dependencies with `Pkg.build("DecFP", "Ipopt")`
- build a single package by running its `deps/build.jl` script

i am inexperienced with coding and confused about this .

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**Author:** ![pfitzseb](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pfitzseb/32/45566_2.png) [@pfitzseb](https://discourse.julialang.org/u/pfitzseb)\
**Post date:** [April 5, 2018, 12:57pm UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/5 "2018-04-05T12:57:09Z")

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So did you try `Pkg.build("DecFP", "Ipopt")`? What errors are you getting?

This might be caused by you using JuliaPro, so maybe try with a plain Julia installation instead.

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**Author:** ![Jelly](https://avatars.discourse-cdn.com/v4/letter/j/a87d85/32.png) [@Jelly](https://discourse.julialang.org/u/Jelly)\
**Post date:** [April 6, 2018, 1:39am UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/6 "2018-04-06T01:39:43Z")

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After i trying this ,it come with

LoadError: could not spawn `powershell -NoProfile -Command '[System.Net.ServicePointManager]::Securi tyProtocol = [System.Net.SecurityProtocolType]::Tls12; $webclient = (New-Object System.Net.Webclient); $webclient.DownloadFile("https://github.com/staticfloat/IpoptBuilder/releases/download/v3.12.8-9/Ipo pt.x86_64-w64-mingw32.tar.gz", "d:\JuliaPro-0.6.2.2\pkgs-0.6.2.2\v0.6\Ipopt\deps\usr\downloads\Ipopt .x86_64-w64-mingw32.tar.gz") '`: operation not permitted (EPERM)  
while loading d:\JuliaPro-0.6.2.2\pkgs-0.6.2.2\v0.6\Ipopt\deps\build.jl, in expression starting on l  
ine 13

[BUILD ERRORS]

WARNING: DecFP and Ipopt had build errors.

- packages with build errors remain installed in d:\JuliaPro-0.6.2.2\pkgs-0.6.2.2\v0.6
- build the package(s) and all dependencies with `Pkg.build("DecFP", "Ipopt")`
- build a single package by running its `deps/build.jl` script

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<div class="post-metadata">

**Author:** ![Jelly](https://avatars.discourse-cdn.com/v4/letter/j/a87d85/32.png) [@Jelly](https://discourse.julialang.org/u/Jelly)\
**Post date:** [April 6, 2018, 3:33am UTC](https://discourse.julialang.org/t/some-question-about-ipopt-package/10150/7 "2018-04-06T03:33:56Z")

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yes, i 'm using JuliaPro