Hi there, I'm using the t4 I built checked out and built on Friday, and I noticed the following: java.lang.NoClassDefFoundError: <myExistantButNotPreviouslyLoadedClass> at <myServlet>.valueUnbound(ServletSession.java:333) at org.apache.catalina.session.StandardSession.removeAttribute(StandardSession. java:953) at org.apache.catalina.session.StandardSession.expire(StandardSession.java:551) at org.apache.catalina.session.StandardManager.processExpires(StandardManager.j ava:744) at org.apache.catalina.session.StandardManager.run(StandardManager.java:815) at java.lang.Thread.run(Thread.java:484) Seems that it can't successfully load classes when processing a valueUnBound event? The class that it can't find is available in the same WEB-INF/classes dir as the main servlet class... The same code works fine on t3... Geoff -- "I hate to advocate weird chemicals, alcohol, violence or insanity to anyone... but they've always worked for me." - Hunter S. Thompson