An error has occured

org.apache.cocoon.ProcessingException: Incomplete pipeline: 'handle-error' without a 'type' must include a generator, at <map:handle-errors> - file:/var/www/progcours/cocoon/sitemap.xmap:129:22
Either add a generator (preferred) or a type='500' attribute (deprecated) on 'handle-errors'
<map:mount> - context://sitemap.xmap - 1015:43

Cocoon stacktrace[hide]

Incomplete pipeline: 'handle-error' without a 'type' must include a generator, at <map:handle-errors> - file:/var/www/progcours/cocoon/sitemap.xmap:129:22
Either add a generator (preferred) or a type='500' attribute (deprecated) on 'handle-errors'
context://sitemap.xmap - 1015:43<map:mount>

Java stacktrace[hide] 

org.apache.cocoon.ProcessingException: Incomplete pipeline: 'handle-error' without a 'type' must include a generator, at <map:handle-errors> - file:/var/www/progcours/cocoon/sitemap.xmap:129:22
Either add a generator (preferred) or a type='500' attribute (deprecated) on 'handle-errors'
	at <map:mount> - file:/var/tomcat/webapps/cocoon/sitemap.xmap:1015:43
	at org.apache.cocoon.components.treeprocessor.sitemap.HandleErrorsNode.invoke(HandleErrorsNode.java:97)
	at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.prepareErrorHandler(ErrorHandlerHelper.java:182)
	at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.prepareErrorHandler(ErrorHandlerHelper.java:135)
	at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.invokeErrorHandler(ErrorHandlerHelper.java:108)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:157)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:235)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:177)
	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:253)
	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:118)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:235)
	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:177)
	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:253)
	at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1154)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)

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