It looks like Seam is trying to validate a document via an Internet-based lookup - is it going to be required that your deployment environment have access to the Internet in order to avoid this exception at startup? Once I set '-Dhttp.proxyHost=...' in the run.bat for my jboss to a legit value the exception went away - i.e. org.jboss.seam.core.Pages is able to use the Internet to validate pages.xml. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4027143#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...