feasible solution of .sol files is always 0

[Albin31]

Describe the bug When we write an initial feasible solution in a .sol file, it always gives "optimal feasible solution - 0".

To Reproduce Try any writing on a .sol file of an optimizer function.

Expected behavior I expected to have the first feasible solution of my optimization problem.

Desktop (please complete the following information):

• Operating System, version: Windows 10
• Python version:
• Python-MIP version (we recommend you to test with the latest version): latest

Additional context I think that the issue is related to the function 'save_mipstart' which seems to be by default at 0 and never changes.

[sebheger]

@Albin31 Can you provide us a minimalistic example of code and .sol files that we can retrace your problem?