# Clp: problem to build the package

**URL:** <https://discourse.julialang.org/t/clp-problem-to-build-the-package/48763>\
**Category:** Optimization (Mathematical)\
**Created:** [October 21, 2020, 5:42pm UTC](https://discourse.julialang.org/t/clp-problem-to-build-the-package/48763 "2020-10-21T17:42:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Luca](https://avatars.discourse-cdn.com/v4/letter/l/51bf81/32.png) [@Luca](https://discourse.julialang.org/u/Luca)\
**Post date:** [October 21, 2020, 5:42pm UTC](https://discourse.julialang.org/t/clp-problem-to-build-the-package/48763/1 "2020-10-21T17:42:03Z")

</div>

Dear all,

I have installed Clp, but when I try to build it, julia reports:

julia\> Pkg.build(“Clp”)  
Building CodecZlib ─→ `~/.julia/packages/CodecZlib/5t9zO/deps/build.log`  
Building MbedTLS ───→ `~/.julia/packages/MbedTLS/X4xar/deps/build.log`  
Building ZipFile ───→ `~/.julia/packages/ZipFile/DW0Qr/deps/build.log`  
Building CodecBzip2 → `~/.julia/packages/CodecBzip2/T5yr7/deps/build.log`  
Building Clp ───────→ `~/.julia/packages/Clp/3ZgbR/deps/build.log`  
┌ Error: Error building `Clp`:  
│ [Info: Downloading [https://github.com/JuliaBinaryWrappers/CoinUtils\_jll.jl/releases/download/CoinUtils-v2.11.3+2/CoinUtils.v2.11.3.x86\_64-apple-darwin14-cxx03.tar.gz](https://github.com/JuliaBinaryWrappers/CoinUtils_jll.jl/releases/download/CoinUtils-v2.11.3+2/CoinUtils.v2.11.3.x86_64-apple-darwin14-cxx03.tar.gz) to /Users/luca/.julia/packages/Clp/3ZgbR/deps/usr/downloads/CoinUtils.v2.11.3.x86\_64-apple-darwin14-cxx03.tar.gz…  
│ ERROR: LoadError: LoadError: Could not download [https://github.com/JuliaBinaryWrappers/CoinUtils\_jll.jl/releases/download/CoinUtils-v2.11.3+2/CoinUtils.v2.11.3.x86\_64-apple-darwin14-cxx03.tar.gz](https://github.com/JuliaBinaryWrappers/CoinUtils_jll.jl/releases/download/CoinUtils-v2.11.3+2/CoinUtils.v2.11.3.x86_64-apple-darwin14-cxx03.tar.gz) to /Users/luca/.julia/packages/Clp/3ZgbR/deps/usr/downloads/CoinUtils.v2.11.3.x86\_64-apple-darwin14-cxx03.tar.gz:  
│ ErrorException(“”)  
│ Stacktrace:  
│ [1] error(::String) at ./error.jl:33  
│ [2] #download#96(::Bool, ::Function, ::String, ::String) at /Users/luca/.julia/packages/BinaryProvider/U2dKK/src/PlatformEngines.jl:619  
│ [3] #download at ./none:0 [inlined]  
│ [4] #download\_verify#97(::Bool, ::Bool, ::Bool, ::Function, ::String, ::String, ::String) at /Users/luca/.julia/packages/BinaryProvider/U2dKK/src/PlatformEngines.jl:688  
│ [5] #download\_verify at ./none:0 [inlined]  
│ [6] #install#137(::Prefix, ::String, ::Bool, ::Bool, ::Bool, ::Function, ::String, ::String) at /Users/luca/.julia/packages/BinaryProvider/U2dKK/src/Prefix.jl:314  
│ [7] (::getfield(BinaryProvider, Symbol(“#kw##install”)))(::NamedTuple{(:prefix, :force, :verbose),Tuple{Prefix,Bool,Bool}}, ::typeof(install), ::String, ::String) at ./none:0  
│ [8] top-level scope at /Users/luca/.julia/packages/Clp/3ZgbR/deps/build\_CoinUtils.v2.11.3.jl:55  
│ [9] include at ./boot.jl:317 [inlined]  
│ [10] include\_relative(::Module, ::String) at ./loading.jl:1044  
│ [11] include at ./sysimg.jl:29 [inlined]  
│ [12] include(::String) at ./loading.jl:1079  
│ [13] top-level scope at none:0  
│ [14] eval at ./boot.jl:319 [inlined]  
│ [15] evalfile(::String, ::Array{String,1}) at ./loading.jl:1075 (repeats 2 times)  
│ [16] top-level scope at /Users/luca/.julia/packages/Clp/3ZgbR/deps/build.jl:137  
│ [17] include at ./boot.jl:317 [inlined]  
│ [18] include\_relative(::Module, ::String) at ./loading.jl:1044  
│ [19] include(::Module, ::String) at ./sysimg.jl:29  
│ [20] include(::String) at ./client.jl:392  
│ [21] top-level scope at none:0  
│ in expression starting at /Users/luca/.julia/packages/Clp/3ZgbR/deps/build\_CoinUtils.v2.11.3.jl:53  
│ in expression starting at /Users/luca/.julia/packages/Clp/3ZgbR/deps/build.jl:117  
│ [19:38:07] curl: (48) An unknown option was passed in to libcurl  
└ @ Pkg.Operations /Users/julia/buildbot/worker/package\_macos64/build/usr/share/julia/stdlib/v1.0/Pkg/src/Operations.jl:1096

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<div class="post-metadata">

**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [October 21, 2020, 6:07pm UTC](https://discourse.julialang.org/t/clp-problem-to-build-the-package/48763/2 "2020-10-21T18:07:09Z")

</div>

Try again. This is probably just be a network connectivity issue.

Alternatively, if you are on a company network, your firewall may be blocking things. Contact your IT support.