A question about my Gurobi

Why can’t my Gurobi install??

(@v1.6) pkg> build Gurobi
Building Gurobi → C:\Users\dell\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\0c39671e531549c2969bdf0c0513d03a07f9ffd8\build.log
ERROR: Error building Gurobi:
ERROR: LoadError: Unable to locate Gurobi installation. If the advice above did not help,
open an issue at GitHub - jump-dev/Gurobi.jl: Julia interface for Gurobi Optimizer and post the full
print-out of this diagnostic attempt.

[1] error(s::String)
@ Base .\error.jl:33
[2] top-level scope
@ C:\Users\dell.julia\packages\Gurobi\Dn7m0\deps\build.jl:161
[3] include(fname::String)
@ Base.MainInclude .\client.jl:444
[4] top-level scope
@ none:5
in expression starting at C:\Users\dell.julia\packages\Gurobi\Dn7m0\deps\build.jl:155

Unable to locate Gurobi installation. Running some common diagnostics.

Gurobi.jl only supports the following versions:

  • gurobi91
  • gurobi90

Did you download and install one of these versions from gurobi.com?
Installing Gurobi.jl via the Julia package manager is not sufficient!

Found GUROBI_HOME = C:\gurobi950\win64

Does this point to the correct install location?

We’re going to look for the Gurobi library in this directory:

That directory has the following files:

  • C:\gurobi950\win64\bin\Gurobi95.NET.XML
  • C:\gurobi950\win64\bin\Gurobi95.NET.dll
  • C:\gurobi950\win64\bin\GurobiJni95.dll
  • C:\gurobi950\win64\bin\grb_ts.exe
  • C:\gurobi950\win64\bin\grbcluster.exe
  • C:\gurobi950\win64\bin\grbgetkey.exe
  • C:\gurobi950\win64\bin\grbprobe.exe
  • C:\gurobi950\win64\bin\grbtune.exe
  • C:\gurobi950\win64\bin\gurobi.bat
  • C:\gurobi950\win64\bin\gurobi95.dll
  • C:\gurobi950\win64\bin\gurobi95_light.dll
  • C:\gurobi950\win64\bin\gurobi_cl.exe
  • C:\gurobi950\win64\bin\vslauncher.exe
  • C:\gurobi950\win64\bin\vswhere.exe

We were looking for (but could not find) a file named like
libgurobiXXX.so, libgurobiXXX.dylib, or gurobiXXX.dll.

You should set the GUROBI_HOME environment variable to point to the
install location then try again. For example (updating the path to the
correct location if needed):

# On Windows, this might be
ENV["GUROBI_HOME"] = "C:\\Program Files\\gurobi910\\win64\\"
import Pkg

# On OSX, this might be
ENV["GUROBI_HOME"] = "/Library/gurobi910/mac64/"
import Pkg

# On Unix, this might be
ENV["GUROBI_HOME"] = "/opt/gurobi910/linux64/"
import Pkg

Note: your path may differ. Check which folder you installed the Gurobi
binary in, and update the path accordingly.


Probably the Gurobi.jl version you are trying to install does not recognize the 95 in gurobi95.dll as a valid version. Did you try to force Julia to install Gurobi.jl 0.10.1? (i.e., the most recent version.)