# Using Pardiso with Ipopt/JuMP, install custom built Ipopt binaries

**URL:** <https://discourse.julialang.org/t/using-pardiso-with-ipopt-jump-install-custom-built-ipopt-binaries/41623>\
**Category:** New to Julia\
**Created:** [June 17, 2020, 7:04pm UTC](https://discourse.julialang.org/t/using-pardiso-with-ipopt-jump-install-custom-built-ipopt-binaries/41623 "2020-06-17T19:04:27Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dadada\_dadada](https://avatars.discourse-cdn.com/v4/letter/d/ce7236/32.png) [@dadada\_dadada](https://discourse.julialang.org/u/dadada_dadada)\
**Post date:** [June 17, 2020, 7:04pm UTC](https://discourse.julialang.org/t/using-pardiso-with-ipopt-jump-install-custom-built-ipopt-binaries/41623/1 "2020-06-17T19:04:27Z")

</div>

Hello, I’m trying to use Ipopt with pardiso linear solver. I am trying to install its libraries with the commands given in the Ipopt.jl readme. I got the following files

libpardiso600-WIN-X86-64.dll  
libpardiso600-WIN-X86-64.exp  
libpardiso600-WIN-X86-64.lib

both folders have the same three files. Can anyone look into it?

```julia

julia> ENV["JULIA_IPOPT_EXECUTABLE_PATH"] = "C:/bin"
"C:/bin"

julia> ENV["JULIA_IPOPT_LIBRARY_PATH"] = "C:/lib"
"C:/lib"

(@v1.4) pkg> build Ipopt

   Building Ipopt → `C:\Users\emcig\.julia\packages\Ipopt\YJcu4\deps\build.log`
┌ Error: Error building `Ipopt`: 
│ ERROR: LoadError: Could not install custom libraries from C:/lib and C:/bin.       
│ To fall back to BinaryProvider call delete!(ENV,"JULIA_IPOPT_LIBRARY_PATH");delete!(ENV,"JULIA_IPOPT_EXECUTABLE_PATH") and run build again.
│ Stacktrace:
│ [1] error(::String) at .\error.jl:33
│ [2] top-level scope at C:\Users\dadada\.julia\packages\Ipopt\YJcu4\deps\build.jl:122
│ [3] include(::String) at .\client.jl:439
│ [4] top-level scope at none:5
│ in expression starting at C:\Users\dadada\.julia\packages\Ipopt\YJcu4\deps\build.jl:116

```