Hi Sascha if you use some file like txt for read or write you have to check path of this files and if you dont use any files like this you can try Project - Clean.. i saw the same problem but i didnt remember what i did..
if you didnt find the solitions last option is open properties for project and seam settings and try to chech deployment link.. you can see browse and when you click you can select
i hope you can find solition of your problem..
With jboss 6 the problem doesn't appear but with jboss 5.x i can not find a solution. In the internet a few people say that this is a jboss problem. Jboss 5.x have generally problems with seam 2.2.x.
Is this right?