[java.lang.NullPointerException]

I have the same problem, It occurs too when you try to edit a control defined before. I don't understand what I need to do.

Code:

jasperserver  java.lang.NullPointerException  java.lang.NullPointerException 	at com.jaspersoft.jasperserver.war.action.ReportUnitAction.selectControlType(ReportUnitAction.java:566) 	at sun.reflect.GeneratedMethodAccessor970.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:585) 	at org.springframework.webflow.action.DispatchMethodInvoker.invoke(DispatchMethodInvoker.java:98) 	at org.springframework.webflow.action.MultiAction.doExecute(MultiAction.java:123) 	at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:188) 	at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51) 	at org.springframework.webflow.action.EvaluateAction.doExecute(EvaluateAction.java:79) 	at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:188) 	at org.springframework.webflow.execution.AnnotatedAction.execute(AnnotatedAction.java:145) 	at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51) 	at org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:101) 	at org.springframework.webflow.engine.State.enter(State.java:194) 	at org.springframework.webflow.engine.Transition.execute(Transition.java:227) 	at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:391) 	at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214) 	at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:119) 	at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:555) 	at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:386) 	at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210) 	at org.springframework.webflow.engine.ViewState.handleEvent(ViewState.java:230) 	at org.springframework.webflow.engine.ViewState.resume(ViewState.java:196) 	at org.springframework.webflow.engine.Flow.resume(Flow.java:545) 	at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:259) 	at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:163) 	at sun.reflect.GeneratedMethodAccessor260.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:585) 	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307) 	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) 	at org.springframework.security.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:66) 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 	at $Proxy17.resumeExecution(Unknown Source) 	at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183) 	at org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174) 	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) 	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807) 	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) 	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511) 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 	at com.jaspersoft.jasperserver.war.common.UploadMultipartFilter.doFilter(UploadMultipartFilter.java:83) 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378) 	at com.jaspersoft.jasperserver.war.security.JSSwitchUserProcessingFilter.doFilterHttp(JSSwitchUserProcessingFilter.java:146) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109) 	at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:105) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at com.jaspersoft.jasperserver.api.metadata.user.service.impl.MetadataAuthenticationProcessingFilter.doFilter(MetadataAuthenticationProcessingFilter.java:139) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at com.jaspersoft.jasperserver.war.util.RequestParameterAuthenticationFilter.doFilter(RequestParameterAuthenticationFilter.java:97) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.ui.basicauth.BasicProcessingFilter.doFilterHttp(BasicProcessingFilter.java:174) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at com.jaspersoft.jasperserver.war.UserPreferencesFilter.doFilter(UserPreferencesFilter.java:175) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:277) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at com.jaspersoft.jasperserver.war.UserPreferencesFilter.doFilter(UserPreferencesFilter.java:175) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at com.jaspersoft.jasperserver.api.logging.filter.BasicLoggingFilter.doFilter(BasicLoggingFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235) 	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53) 	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) 	at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:175) 	at org.springframework.security.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:99) 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 	at com.jaspersoft.jasperserver.war.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:67) 	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236) 	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) 	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) 	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) 	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) 	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 	at java.lang.Thread.run(Thread.java:595)