Thanks Leon!!! Ok I made it using the servletcontext like you have said :-), with this
servlet.getServletContext().setAttribute("objHospital", objHospital); All works fine, even if the user made a mistake :) One question: 1- I dont understand something about the servletContext, which is the problem of have multiple-server configuration? In both servers the data is store in the servlet context right? I guess the problem is that in some moment the objHospital in one server is diferent to the objHospital in other server because it change in the database? Or that the actions of one war don´t have the same servlet context that the actions on other war? I really don´t understand this, can you explain me that, like i said all works fine but i want to understand this. Thanks