Hi I have no more ideas to correct my model.

I don’t know why my binary variables is not a binary.

The binary result is not a binary, even declaring that as “Binary Variable”

could some one help me with this?

Hi I have no more ideas to correct my model.

I don’t know why my binary variables is not a binary.

The binary result is not a binary, even declaring that as “Binary Variable”

could some one help me with this?

Hi, you should always check the model and solver status.

```
S O L V E S U M M A R Y
MODEL Rede OBJECTIVE cost
TYPE MINLP DIRECTION MINIMIZE
SOLVER SBB FROM LINE 122
**** SOLVER STATUS 4 Terminated By Solver
**** MODEL STATUS 9 Intermediate Non-Integer
**** OBJECTIVE VALUE 7.0711
```

Intermediate non-integer means that SBB did not find a feasible solution

Fred

Yes, thanks.

Hi,

I seem to be having a similar problem: SBB reports an INTEGER SOLUTION (Fig.1), but my binary variable y has values like 1e-6 (Fig.2).

However if I run ANTIGONE(or SBB again) afterwards, it accepts the objective value of SBB, but the binaries are now all 0 and 1.

As all solvers SBB has a tolerance for what it considers to be integer, see https://www.gams.com/38/docs/S_SBB.html#SBBepint. The default for epint is at 1e-5. So if abs(round(x)-x)<epint x does not need to be branched on. You can change the tolerance within a solver option file.

-Michael

Thanks Michael!