Thanks to all the help 
that I have found here.
This is about creating a Image Gallery, Dynamic Components and ClickTools.
When the Button is pressed, the list, HorizontalScrollArrangement is loaded with the files from the Directory.
The next time when another path is specified, Error occurs.
I want to know how to unregister the components and clear the HorizontalScrollArrangement?
Gallery2.aia (178 KB)