I'm using Win2k_sp4, j2sdk1.4.2_03, jboss-4.0.1sp1 and jboss-profiler-1.0.RC3. While profiling, I activate and stop data gathering with JMX console. Every step goes well until the .log.gz files are generated. But when I go to the "localhost:8080/jboss-profiler -> Runtime Profiler" and enter the directory D:\temp where I store the log files, nothing happens, only a blank page is displayed. Then I try to "load saved data" and select a .log.gz, but it throws an exception: javax.servlet.ServletException: Servlet execution threw an exception org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75) I checked carefully the previous subjects in the forum, it seemed that someone had encountered the same problem as mine. I've tried several solutions mentioned in those posts, but they didn't work. The problem still exists. Could anyone tell me what points should be carefully checked to ensure the profiler works well? Thanks a lot! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3966099#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...