Dear Tao, Thanks so much! The performance option worked well. Now I get stable results for every run 🙂 One hopefully, last question: When I change the seed, I obtain varying results with each run. This suggests that my estimates are not even local minima. If you have any advice on how I can make my results robust to changes in seed value, that would be greatly appreciated. Thanks again for patiently responding to my queries. best wishes, Srini
... View more