I tried to make JBoss Wiki jbosswiki-beta2-bin.tgz run under JBoss portal v2.2 (jboss-portal-2.2.1-SP3.zip). App server: jboss-4.0.4.GA.zip EJB3 patch: jboss-EJB-3.0_RC8-FD.zip I'm having exactly same error preventing Wiki editing. (When I login to portal, then click wiki's edit button, I got just blank screen in place of wiki portlet): 16:56:33,989 ERROR [STDERR] java.lang.NullPointerException | 16:56:33,989 ERROR [STDERR] at org.jboss.wiki.WikiEngine.getByName(WikiEngin | e.java:136) | 16:56:33,989 ERROR [STDERR] at org.jboss.wiki.WikiEngine.getByName(WikiEngin | e.java:120) | 16:56:33,989 ERROR [STDERR] at org.jboss.wiki.WikiPortlet.doView(WikiPortlet | .java:407) | 16:56:34,005 ERROR [STDERR] at javax.portlet.GenericPortlet.doDispatch(Gener | icPortlet.java:167) Please update me with the status of the issue. Thank you, Andrey View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4023180#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...