Wit Jakuczun
Wit Jakuczun
Check if this works for you: [https://python-mip.readthedocs.io/en/latest/custom.html#providing-initial-feasible-solutions]()
Strange, it works for me perfectly. 😃
I observe the same error using 1.7.3. Sometimes variables in lazy cut generator are of NoneType or their value (x) is of NoneType.
But is it correct that there is a variable but its "x" attribute is NoneType?
It can be related to #66
Turning off lazy constraint generator makes solver working properly.