Hi, I also get this exception. java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser The funny thing is that the same setup works on my local machine (Mac 10.5), and only fails when run on a second machine that I'm staging on as a server (also OS X but snow leapard 10.6) I run JasperServer in jboss 4.2.3 on both environments. My java (the one that has no problems) is java version "1.5.0_26" The version having issues is is java version "1.5.0_19" I don't believe the versions are a problem, but am giving them incase it helps anyone with a solution. I have done a lot of Googling, and the common theme that keeps comming up is something to do with X11. This makes a little sense to me given the rendering nature of jasper, and the fact I see the failure occur when the report is generating (The actual JasperServer Web UI navigates and functions fine). I suspect the issue is actually happening between Jasper and the awt classes it uses for it's rendering but I'm not really sure. Does anyone have a solution or idea about this? I have tried -Djava.awt.headless=true as a JVM arg, which removed the above exception, but introduced some Font problems (where fonts should have been available). I'm wondering could it be a dependency on X11 libs by the JVM that is having permission problems or something. Thanks for any follup.