ADF 10.1.3.3 Dialog throws nullPointerException after first logout

Question

I've got an application that uses dialogs to do things like add a contact to a job or a workgroup to a contact etc. The application also uses j_security_check to control logging in and out of the application. The dialogs use pageDefs with iterators and are launched using partial submit=true and use window=true and all works well until you log out. When you log back in as any user and use any dialog you get a null pointer exception on each of the fields bound to the pagedef. It is nothing to do with the connection, views and iterators because I found that even if I just use dummy variables created in the pagedef or use a Globals Iterator I still get the error when the form validates so you can't debug it in the backing bean action or event method because it fails validation prior to this.
The error happens both in embedded oc4j and standalone. I've googled this a lot but haven't seen any similar issues.
If I get rid of the use window=true and ppr=true it works fine but I would prefer the popup window.

Answer 1

Yes Frank. It is invalidated in the following action on the logout form
public String commandButton_action() throws IOException{
FacesContext ctx = FacesContext.getCurrentInstance();
ExternalContext ectx = ctx.getExternalContext();
HttpServletResponse response = (HttpServletResponse)ectx.getResponse();
HttpSession session = (HttpSession)ectx.getSession(false);
session.invalidate();
response.sendRedirect("/soe-admin/soe/app/Welcome.jspx");
ctx.responseComplete();
return null;
It redirects to the Welcome.jspx page which requires authentication so you are immediately challenged by the logon screen. Once authenticated, the Welcome screen appears with tabs that allow you to navigate to various functions and their dialogs. The tab's actions are Global navigation rules with redirect set to false. I tried setting redirect to true but once you drill down to the dialog it still fails after the first logout.
Removing the responseComplete() made no diference.
Thanks
Greg