Error: 500

Location: /cocoon/vhp-dev/loc.natlib.afc2001001.3521/

Internal Servlet Error:
java.lang.IllegalStateException: can't reset buffer after writing to client
	at org.apache.tomcat.core.Response.reset(Response.java:264)
	at org.apache.tomcat.facade.HttpServletResponseFacade.reset(HttpServletResponseFacade.java:295)
	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1079)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
	at org.apache.tomcat.core.Handler.invoke(Handler.java(Inlined Compiled Code))
	at org.apache.tomcat.core.Handler.service(Handler.java(Compiled Code))
	at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
	at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
	at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
	at org.apache.tomcat.modules.server.Ajp12Interceptor.processConnection(Ajp12Interceptor.java:221)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java(Compiled Code))
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
	at java.lang.Thread.run(Thread.java:513)