Hi @i_mazlov ,
Thanks for your time, sorry for my bad that I use a confusing word for "id", I should say "asset id", but as you said, I can use ID to check this, for some reason, I overlooked this for a moment.
And the GetParent(), I found out that the culprit is GetSelectedNodes(), I use this to get a selected node(abs bode) but the return is "group", so what ever I try the return is 'Root'.
Thanks for all your works!
Cheers~
DunHou