I use Tomcat 4.0-b6 right now. And I frequentlly run into an error as the followings: A Servlet Exception Has Occurred Exception Report: org.apache.jasper.JasperException: Unable to compile class for JSP ...... Root Cause: java.lang.IllegalArgumentException: Illegal Load: 0.75 If I try to load the same page again, the error can disappear. This problem threatens our server's availability. Can anyone tell me how to work around this problem? Whether it is resolved in the beta 7 or not? Thank, Vernon Wu