500 Servlet Exception

java.lang.NullPointerException
	at com.rgb.utils.StringUtils.HTMLDecode(StringUtils.java:273)
	at com.rgb.wm.xmlengine.Document.getDescription(Document.java:490)
	at _inc._permis._permis_22ddata__jsp._jspService(/inc/guichet/guichet-data.jsp:18)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
	at com.caucho.jsp.Page.subservice(Page.java:506)
	at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:362)
	at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:274)
	at com.caucho.jsp.QPageContext.include(QPageContext.java:547)
	at _inc._permis._section_22dpermis__jsp._jspService(_section_22dpermis__jsp.java:34)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
	at com.caucho.jsp.Page.subservice(Page.java:506)
	at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:362)
	at com.caucho.server.http.QRequestDispatcher.include(QRequestDispatcher.java:274)
	at com.caucho.jsp.QPageContext.include(QPageContext.java:547)
	at _permis._index__jsp._jspService(_index__jsp.java:60)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
	at com.caucho.jsp.Page.subservice(Page.java:506)
	at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
	at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
	at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
	at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
	at java.lang.Thread.run(Thread.java:479)

Resin 2.1.11 (built Mon Sep 8 09:36:19 PDT 2003)