Sounds to me like a weird design. What is the reason to use apex applications as iframes for other apex applications?
Thanks for the reply,
In our project we have 10 modules. so we created each application per module. After that we have created I frames(new page templates templates in 120 apllication).
I can able to to handle all security things but unable to resolve session idle time out.
Please give the solution and if you want i can provide details information.
If any one knows please suggest me the solution..