HTTP Status 500

I have installed NetFlow on my linux server under root and it looks like it is collecting successfully. I can log into the app using http://[IP]:8080 and when I click on the "One Min Graph" on the Interface View then there is a Java error shown below. Also when I click IfIndex# interface nothing is displayed.

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758) org.apache.jsp.jspui.ajaxGraph_jsp._jspService(ajaxGraph_jsp.java:280) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) com.adventnet.netflow.utils.EncodingFilter.doFilter(EncodingFilter.java:45)

root cause

java.lang.NoClassDefFoundError org.jfree.chart.JFreeChart.<init>(JFreeChart.java:316) com.adventnet.netflow.beans.ReportDetailsBean.generateGraphTimeSeries(ReportDetailsBean.java:1386) com.adventnet.netflow.beans.ReportDetailsBean.generateGraphTimeSeries(ReportDetailsBean.java:1165) com.adventnet.netflow.beans.ReportDetailsBean.getGraphPageResultsSync(ReportDetailsBean.java:381) org.apache.jsp.jspui.ajaxGraph_jsp._jspService(ajaxGraph_jsp.java:255) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) com.adventnet.netflow.utils.EncodingFilter.doFilter(EncodingFilter.java:45)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.