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java.lang.NullPointerException: 	at java.util.Properties$LineReader.readLine(Properties.java:418)	at java.util.Properties.load0(Properties.java:337)	at java.util.Properties.load(Properties.java:325)	at com.xpn.xwiki.XWikiConfig.loadConfig(XWikiConfig.java:56)	at com.xpn.xwiki.XWikiConfig.(XWikiConfig.java:51)	at com.xpn.xwiki.XWiki.getVersion(XWiki.java:734)	at com.xpn.xwiki.api.XWiki.getVersion(XWiki.java:79)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.velocity.runtime.parser.node.PropertyExecutor.execute(PropertyExecutor.java:137)	at org.apache.velocity.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:350)	at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:180)	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74)	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88)	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:240)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:143)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1238)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1199)	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:490)	at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:194)	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170)	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:240)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:143)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1238)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1199)	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:490)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:294)	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:194)	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170)	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:240)	at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:143)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1238)	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1199)	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:94)	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:48)	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:154)	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1098)	at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:117)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:406)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)	at org.mortbay.jetty.Server.handle(Server.java:295)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:503)	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:827)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:511)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:210)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:379)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:361)	at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)