Thank you for your suggestion, but maybe I didn't describe it clearly.

if I don't use WebTreeView in WebCombo A. It works well.

In webCombo B,  "----" is just a value like "abcd".

Once I use WebTreeView in WebCombo A,  the value of WebCombo B will not change according to the selected item in WebCombo A.

In my opinion, maybe it is a bug about WebTreeView & LinkSettings.

I try to do it as your suggestion, but it is still abnormal.

It seems that the program is abnormal only on my computer. It's ok on other computers or servers.

So....do you have any more solution?

Thank you~

Hi,

Thank you for your work! I'll wait for your reply.

Thank you for your hard work! I will try to write a demo that could run on your end then attach it as soon as possible.