Ok, Ok.. You've heard it, written responses, and thought it was wrapped up and no one would ever have this problem again :) I'm trying to embed Tomcat 4 beta 6 into my application. I am also using Castor (http://castor.exolab.org), which requires Xerces. I'm getting the sealing violation after Castor starts and during the startup of Catalina. I have basically created a wrapper to invoke the main of the Bootstrap class for Tomcat. Anyone performed a similiar task? Most of the archives I see relate to deploying web apps, but I'm not able to launch Tomcat to even approach this. I tried copying the tomcat/jasper/jaxp.jar and crimson.jar over to my project's lib directory that the CLASSPATH references, and even moving jaxp, crimson, and xerces around in my classpath in combination. Any ideas? Please don't tell me to RTFM, as I have and still can't get past the issue. I've tried searching the mailing list archives, but most threads are related to web apps, as I mentioned earlier. I'm hoping someone who has done the same thing can give me a cookbook or lessons learned to assist in getting this to work. I've been using Tomcat 3.x for some time and really love the product, and want to try to get it deployed within my application's VM (rather than spawning a separate process). Regards, James <DETAILS> Here is my current CLASSPATH: LOCALCLASSPATH=3D"./lib/activation.jar:./lib/castor-0.9.2-xml.jar:./lib/c= astor-0.9.2.jar:./lib/jaxp.jar:./lib/crimson.jar:./lib/xerces.jar:./class= es:./properties:......." Here is the command line launcher: $JAVACMD -Dcatalina.home=3D"./tomcat" -classpath "$LOCALCLASSPATH" com.myproject.Boot "$@" Here is a listing of my jars for byte sizes, just in case: -rw-r--r-- 1 james None 295934 Jun 24 23:17 ant-1.3.jar -rw-r--r-- 1 james None 241856 Jun 24 23:17 ant-optional.jar -rw-r--r-- 1 james None 517501 Jun 24 23:17 castor-0.9.2-xml.jar -rw-r--r-- 1 james None 1050741 Jun 24 23:17 castor-0.9.2.jar -rw-r--r-- 1 james None 187246 Aug 9 22:08 crimson.jar -rw-r--r-- 1 james None 28466 Aug 9 22:08 jaxp.jar -rw-r--r-- 1 james None 955716 Jun 24 23:18 xerces.jar </DETAILS>