Webdynpro Page builder expired error

Hello Experts,

I am currently working on EP 7.0. I am getting webdynpro pagebuilder expired error message while accessing nwa, system admin, content admin etc.

I have checked several threads on the same error  and tried the following.

1]tcwddispwda   set to 7200

2]Session.timeout set to -1

3]Jsession.cookiedomain set to NONE

4]Session expiration set to 16 hrs

5]Login ticket_lifetime set to 16 hrs  (same as session expiration as per note 842635).

6]Checked for pb application in nwa (Could not find expiration parameter here)

7]Checked page timeout value 15000 ms

But all my attempts have failed. Please let me know what more options can be tried.

PS: https is configured for access to portal.

BR,

Pooja