different Opti-method makes different paramter-results but same SSE?

[WalterSchrabmai]

Hi Friends,

one more question.

Here my sheets: In the first area I used Quasi-Newton and got fine results, nearly the same as the ideal values.

But when I use LM I get much other results but both methods have the same SSE. could this be true?

Thanks

[WalterSchrabmai]

Here the sheet.

[Werner_E]

> could this be true?

I guess yes. An optimization process can have multiple solutions of nearly equal "quality".

It depends how your problem is conditioned, what the error surface looks like. Generally hard to say.

[RichardJ]

See my post in this thread: SSE vs. ERR variable at a MinERR Solveblock?

Perhaps we should stick to one thread for one topic.