If the previous element to a higher level, then return null.

[enrc66]

in my case,return the next element,why?

 

[enrc66]

PreviousSibling:

https://help.zennolab.com/en/v5/zennoposter/5.1/ZennoLab.CommandCenter~ZennoLab.CommandCenter.HtmlElement~PreviousSibling.html

 

[rostonix]

What build do you use?

 

[enrc66]

5.1.2

 

[rostonix]

Should work fine in latest build
There was a bug i reported earlier about this.
Was fixed.