Missing assembliles?

[neggenbe]

Hi,
I'm trying to add the assemblies to my project so I can solve the following problem from the given example:

Model model = new Model(); Variable x = new Variable(); Variable y = new Variable(); model.Add(2 * x + 3 * y <= 10); model.Objective = 3 * x + y; //Solver solver = new Solver(model); //solver.Maximise();

The above code works but when I uncomment the Solver part, I run into the follwing error:

System.BadImageFormatException: Could not load file or assembly 'SonnetWrapper, Version=1.4.0.0, Culture=neutral, PublicKeyToken=null'. An attempt was made to load a program with an incorrect format.
File name: 'SonnetWrapper, Version=1.4.0.0, Culture=neutral, PublicKeyToken=null'

My intuition is that I am missing some dependencies - which ones would that be? Could you please help out?

NOTE: I see another Ijwhost.dll file but MSVS rejects adding it to my project.

[neggenbe]

Ok I found the answer...
It seems I should simply "copy" the Ijwhost.dll file to the output folder (not adding it as an assembly)...

[jhmgoossens]

Glad you found the root cause, and thanks for reporting back!

I had to google ijwhost.dll--which is apparently created in the .NET Core builds for the C++/CLI of SonnetWrapper.
This explains why this error only came up at the solver.Maximise() line, since that is where the SonnetWrapper code comes in to bridge to the C++ of Clp/Cbc etc.

I've changed AppVeyor config to include the ijwhost.dll in the binary zips for net5.0 in 35d21ba.