<A target="_blank" href="http://tech-shed.blogspot.com/2010/03/xpages-not-loading-jvm-errors-possible.html">Chris Harris had some problems after upgrading his servers from Domino 7.0.2 to 8.5.1.1</A> and Xpages wouldn't load. He searched through the logs, and tried a number of things, before he stumbled on the fix.