I understand now that you will say that you can’t help me without providing the whole code to test, but can you at least point me is there anything that I can check for ie: some logging mechanism, debug, the default setting of both solvers, etc.

Both Cbc and SCIP are working (Cbc is running forever), SCIP is giving me a solution after a few minutes of running, but CPLEX is running only a second and say that the model is not feasible, are they really so fast?

```
Warning: Non-integral bounds for integer variables rounded.
Reduced MIP has 44784 rows, 48840 columns, and 836708 nonzeros.
Reduced MIP has 11046 binaries, 210 generals, 0 SOSs, and 47454 indicators.
Presolve time = 0.25 sec. (1135.45 ticks)
Warning: No solution found from 1 MIP starts.
Retaining values of one MIP start for possible repair.
Presolve time = 0.25 sec. (15.03 ticks)
Root node processing (before b&c):
Real time = 0.97 sec. (1223.36 ticks)
Parallel b&c, 8 threads:
Real time = 0.00 sec. (0.00 ticks)
Sync time (average) = 0.00 sec.
Wait time (average) = 0.00 sec.
------------
Total (root+branch&cut) = 0.97 sec. (1223.36 ticks)
termination_status(prmx) = MathOptInterface.INFEASIBLE
```

and this is what SCIP is giving me:

```
presolving:
(round 1, fast) 41005 del vars, 39736 del conss, 0 add conss, 142658 chg bounds, 0 chg sides, 0 chg coeffs, 0 upgd conss, 2982 impls, 42 clqs
(round 2, medium) 41005 del vars, 88500 del conss, 0 add conss, 142658 chg bounds, 0 chg sides, 63116 chg coeffs, 0 upgd conss, 2982 impls, 42 clqs
(2.0s) probing: 51/579 (8.8%) - 0 fixings, 0 aggregations, 0 implications, 0 bound changes
(2.0s) probing aborted: 50/50 successive totally useless probings
(2.0s) symmetry computation skipped: there exist constraints that cannot be handled by symmetry methods.
presolving (3 rounds: 3 fast, 2 medium, 1 exhaustive):
41005 deleted vars, 88500 deleted constraints, 0 added constraints, 142658 tightened bounds, 0 added holes, 0 changed sides, 63116 changed coefficients
2982 implications, 42 cliques
presolved problem has 32424 variables (579 bin, 3192 int, 28653 impl, 0 cont) and 42361 constraints
13409 constraints of type <SOS1>
28952 constraints of type <linear>
transformed objective value is always integral (scale: 0.2)
Presolving Time: 1.00
```

Now, why this:

I didn’t supply any MIP starts so why It says that there is 1?