Get full text output extracted as AVSearchTreeViewClass


I am using “Get full text” activity to extract data from pdf search window (advanced search window) as shown below.
It was running good and I was able to get the search result using get full text.

Now, suddenly I am getting output as "AVSearchTreeViewClass " as value.
I have tried get attribute also, same issue.
I need result section value. how to resolve this?

This is my selector: