This is not a question of options. Yes, people think, if only I knew what options to set, and to exactly what values, the answer would emerge like magic. NOT true. That only happens in the movies or on TV, where computers are all powerful, and the proper code is written in 5 keystrokes to then solve a problem that would require at least a Phd thesis in real life, IF it was solvable at all.
Not all optimization problems converge to the solution you hope to see. That may be because you
1. Coded the objective incorrectly.
2. Formulated the problem poorly (so a poor objective.)
3. Provided poor starting values.
4. The optimization got stuck in a local minimizer.
5. The solution you hoped to see really is not a minimum.
Case 4 is a variation of case 3. Both say that you get to the wrong solution, because you started in the wrong spot.
Probably a few others I forgot to list. But one reason that is only very rarely the case is you chose the wrong settings for options. I would strongly suggest you reconsider each of the possibilities I suggested above. Why cannot I be more accurate in my diagnosis of where the problem lies? Because we see NOTHING about what you actually did! All that we can tell from here is that you had a problem with an optimization. So the answer is you did something wrong.
