; SystemID: ; Line#: 486; Column#: 32
net.sf.saxon.trans.XPathException: A sequence of more than one item is not allowed as the second argument of fn:concat() (@filename="vc-d11-ex1.xml", @filename="vc-d11-ex2.xml", @filename="vc-d11-ex3.xml") 
	at net.sf.saxon.expr.Expression.typeError(Expression.java:1464)
	at net.sf.saxon.expr.SingletonAtomizer.evaluateItem(SingletonAtomizer.java:221)
	at net.sf.saxon.expr.SingletonAtomizer.evaluateItem(SingletonAtomizer.java:31)
	at net.sf.saxon.expr.parser.Evaluator$6.evaluate(Evaluator.java:213)
	at net.sf.saxon.expr.SystemFunctionCall.evaluateArguments(SystemFunctionCall.java:446)
	at net.sf.saxon.expr.FunctionCall.iterate(FunctionCall.java:530)
	at net.sf.saxon.expr.parser.Evaluator$7.evaluate(Evaluator.java:239)
	at net.sf.saxon.expr.SystemFunctionCall.evaluateArguments(SystemFunctionCall.java:446)
	at net.sf.saxon.expr.FunctionCall.iterate(FunctionCall.java:530)
	at net.sf.saxon.expr.parser.Evaluator$11.evaluate(Evaluator.java:330)
	at net.sf.saxon.expr.parser.ExpressionTool.lazyEvaluate(ExpressionTool.java:430)
	at net.sf.saxon.expr.instruct.ApplyTemplates.apply(ApplyTemplates.java:272)
	at net.sf.saxon.expr.instruct.ApplyTemplates.processLeavingTail(ApplyTemplates.java:255)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:352)
	at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:532)
	at net.sf.saxon.expr.instruct.ApplyTemplates.apply(ApplyTemplates.java:300)
	at net.sf.saxon.expr.instruct.ApplyTemplates.processLeavingTail(ApplyTemplates.java:255)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:721)
	at net.sf.saxon.expr.instruct.Choose.processLeavingTail(Choose.java:896)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
	at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
	at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
	at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
	at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
	at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:352)
	at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:532)
	at net.sf.saxon.expr.instruct.ApplyTemplates$ApplyTemplatesPackage.processLeavingTail(ApplyTemplates.java:557)
	at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:451)
	at net.sf.saxon.trans.XsltController.applyTemplates(XsltController.java:747)
	at net.sf.saxon.s9api.AbstractXsltTransformer.applyTemplatesToSource(AbstractXsltTransformer.java:347)
	at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:349)
	at net.sf.saxon.jaxp.TransformerImpl.transform(TransformerImpl.java:71)
	at nl.math4all.gae_m4a.XSLTbean.process(XSLTbean.java:129)
	at nl.math4all.gae_m4a.ViewServlet.doGet(ViewServlet.java:164)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1459)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
	at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
	at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:78)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:571)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at com.google.apphosting.runtime.jetty9.ParseBlobUploadHandler.handle(ParseBlobUploadHandler.java:125)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
	at com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.doHandle(AppEngineWebAppContext.java:289)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:113)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:516)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
	at com.google.apphosting.runtime.jetty9.RpcConnection.handle(RpcConnection.java:269)
	at com.google.apphosting.runtime.jetty9.RpcConnector.serviceRequest(RpcConnector.java:100)
	at com.google.apphosting.runtime.jetty9.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:187)
	at com.google.apphosting.runtime.RequestRunner.dispatchServletRequest(RequestRunner.java:262)
	at com.google.apphosting.runtime.RequestRunner.dispatchRequest(RequestRunner.java:227)
	at com.google.apphosting.runtime.RequestRunner.run(RequestRunner.java:193)
	at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:273)
	at java.lang.Thread.run(Thread.java:750)
<html><head></head><body><h1>Fout opgetreden</h1><p>
A sequence of more than one item is not allowed as the second argument of fn:concat() (@filename="vc-d11-ex1.xml", @filename="vc-d11-ex2.xml", @filename="vc-d11-ex3.xml") 
</p></body></html>