Originally posted by: PingLiu

I am working on a big MILP problem. Before removing zero rows and columns,  the total number of variables is 112,326.

After removing zero rows and columns,

the row number of Aeq size for equality constraints is 46,414

the row number of Aineq size for inequality constraints is 100,970

the total number of variables is reduced to 106,900

the number of integer variables is 34,565.

I am using CPLEX to solve it. It shows that CPlex status is integer optimal solution, exit code: 101.

but it also says that no feasible solution has been obtained.

What does this mean? DO we find the optimal and feasible solution finally?

The output "NO FEASIBLE SOLUTION has been obtained" is not from CPLEX. You should figure out where this comes from and what makes this part of code believe there is no feasible solution. Are you using CPLEX through another framework? If so, then you should check with the people who maintain that framework.