solver solution differs from the best solution

GAMS
1

Hello everybody,

I have used MIP to solve a model. GAMS log showed the following:


Solution satisfies tolerances.

MIP Solution: 46.800000 (245 iterations, 17 nodes)
Final Solve: 46.800000 (18 iterations)

Best possible: 43.800000
Absolute gap: 3.000000
Relative gap: 0.064103

Could anyone here point out reasons for the “MIP solution” differs from the “Best possible” solution?

any tip is quite useful as well.

thank everybody in advance.

2

Hi,

If you want to solve to optimality, you can set the optcr=0.

I hope this helps!

Fred

3

you did great!

thank you so much