Sub-Window from Custom Component leets to Layout Exception

Vaadin 6 / 7 / 8
1

Hi,

I started yesterday migrating my Vaadin 6 application to Vaadin 7. I am also using the Spring integration Add-On.

The problem is, when I am opening a subwindow I get following Client-Side Exception: [quote]
Uncaught Client Side Exception IllegalStateException: Only managed layouts can need layout, layout attempted for null
[/quote]