[ Solidworks ] Symmetry problem for a smoothing!

Hi all

I have a smoothing symmetry problem,

Let me explain, I did a smoothing without any problem, I want to do this symmetry, it works if you want, EXCEPT that the smoothing no longer appears!

I don't understand why. (image provided: smoothing symmetry)

Could you help me or guide me?

Thank you.

Kind regards.


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Hello

Can you show your settings when you do your symmetry or post your piece?

I succeeded by tinkering, symmetry by copying the body!

On the other hand, what's the point of merging the result?

I succeeded by tinkering, symmetry by copying the body!

On the other hand, what's the point of merging the result?