Can highspy read an existing .sol file directly without re-solving the model?

[Shari04]

Is there a way in highspy to read an existing .sol solution file, without solving the model again — something like a read_solution() function? I'm using VB.NET to generate an MPS model, which I pass to Python where highspy solves it. I then try to get the solution values back in VB.NET.

What I do now:

• I generate the .mps model in VB.NET and pass it to Python using StandardInput.
• In Python, I solve the model with HiGHS and print the solution using:

sol = h.get_solution() for i, val in enumerate(sol.colvalue): print(f"x{i+1} = {val}")

• Then in VB.NET, I read the standard output from the Python process to get the solution.

However, I don’t want to re-solve the model every time. Ideally, I’d like to:

• Check if a .sol file already exists and just load the solution with something like read_solution("model.sol").
• Avoid parsing the .sol file manually.
• Keep using highspy if possible.

Is this possible? Or is there a better way to retrieve a solution from file using HiGHS?

Thanks!

[jajhall]

highspy has methods writeSolution and readSolution, both of which take a file name as argument.