Hello! I used the following process to play around with jBPM. Everything worked fine. Lately I added forms to the user tasks. At first just for the first task which is named "request". I could login, open the task and I saw the form. Submitting also worked fine. Afterwards I loggged in as a different user to perform the following tasks and the the form for "hr_review" did not work. Instead an Exception was thrown. | <?xml version="1.0" encoding="UTF-8"?> | | <process description="Urlaubsantrag zum Test der Process Engine" name="demonstration_vacation_request" xmlns="http://jbpm.org/4.0/jpdl" key="demo" version="1"> | <start g="152,6,48,48" name="start1"> | <transition g="-72,-19" name="to request" to="request"/> | </start> | <end g="149,456,48,48" name="end1"/> | <task assignee="mary" form="request.ftl" g="130,87,92,52" name="request"> | <transition g="-49,-21" name="to fork1" to="fork1"/> | </task> | <fork g="153,174,48,48" name="fork1"> | <transition g="22,-21" name="to proj_review" to="proj_review"/> | <transition g="-68,-24" name="to hr_review" to="hr_review"/> | </fork> | <task assignee="mike" form="proj_review.ftl" g="236,257,92,52" name="proj_review"> | <transition g="16,-6" name="to exclusive1" to="decision"/> | </task> | <java class="Vacation" g="321,349,101,52" method="save" name="save_vacation"> | <transition g="-48,-21" name="to end1" to="end1"/> | </java> | <task assignee="alex" form="hr_review.ftl" g="47,257,92,52" name="hr_review"> | <transition g="-105,-13" name="to exclusive1" to="decision"/> | </task> | <decision g="155,341,48,48" name="decision"> | <handler class="Evaluation" /> | <transition g="-48,-21" name="to end1" to="end1"/> | <transition g="-51,-21" name="to save_vacation" to="save_vacation"/> | </decision> | </process> | | 13:00:08,481 ERROR [[Resteasy]] Servlet.service() for servlet Resteasy threw exc | eption | org.jboss.resteasy.spi.UnhandledException: java.lang.RuntimeException: Unexpecte | d invocation exception: null | at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationExcept | ion(SynchronousDispatcher.java:319) | at org.jboss.resteasy.core.SynchronousDispatcher.handleException(Synchro | nousDispatcher.java:230) | at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException( | SynchronousDispatcher.java:206) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:360) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:173) | at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.servi | ce(HttpServletDispatcher.java:93) | at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.servi | ce(HttpServletDispatcher.java:68) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:290) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilte | r.java:59) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi | lter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV | alve.java:235) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV | alve.java:191) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit | yAssociationValve.java:190) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica | torBase.java:433) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv | e.java:92) | at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.proce | ss(SecurityContextEstablishmentValve.java:126) | at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invok | e(SecurityContextEstablishmentValve.java:70) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j | ava:127) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j | ava:102) | at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC | onnectionValve.java:158) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal | ve.java:109) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav | a:330) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java | :828) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce | ss(Http11Protocol.java:601) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44 | 7) | at java.lang.Thread.run(Thread.java:619) | Caused by: java.lang.RuntimeException: Unexpected invocation exception: null | at org.jboss.bpm.console.server.util.InvocationProxy.invoke(InvocationPr | oxy.java:80) | at $Proxy143.provideForm(Unknown Source) | at org.jboss.bpm.console.server.FormProcessingFacade.provideForm(FormPro | cessingFacade.java:181) | at org.jboss.bpm.console.server.FormProcessingFacade.renderTaskUI(FormPr | ocessingFacade.java:120) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. | java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces | sorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl. | java:117) | at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod. | java:260) | at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232 | ) | at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166 | ) | at org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(Dispatch | erUtilities.java:142) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:356) | ... 28 more | Caused by: java.lang.reflect.InvocationTargetException | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. | java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces | sorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at org.jboss.bpm.console.server.util.InvocationProxy.invoke(InvocationPr | oxy.java:64) | ... 41 more | Caused by: java.lang.NullPointerException | at org.jbpm.integration.console.forms.TaskFormDispatcher.provideForm(Tas | kFormDispatcher.java:149) | at org.jbpm.integration.console.forms.FormDispatcherComposite.provideFor | m(FormDispatcherComposite.java:65) | ... 46 more | 13:00:08,559 ERROR [[Resteasy]] Servlet.service() for servlet Resteasy threw exc | eption | org.jboss.resteasy.spi.UnhandledException: java.lang.RuntimeException: Unexpecte | d invocation exception: null | at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationExcept | ion(SynchronousDispatcher.java:319) | at org.jboss.resteasy.core.SynchronousDispatcher.handleException(Synchro | nousDispatcher.java:230) | at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException( | SynchronousDispatcher.java:206) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:360) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:173) | at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.servi | ce(HttpServletDispatcher.java:93) | at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.servi | ce(HttpServletDispatcher.java:68) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:290) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilte | r.java:59) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi | lter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl | icationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF | ilterChain.java:206) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV | alve.java:235) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV | alve.java:191) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit | yAssociationValve.java:190) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica | torBase.java:433) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv | e.java:92) | at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.proce | ss(SecurityContextEstablishmentValve.java:126) | at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invok | e(SecurityContextEstablishmentValve.java:70) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j | ava:127) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j | ava:102) | at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC | onnectionValve.java:158) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal | ve.java:109) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav | a:330) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java | :828) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce | ss(Http11Protocol.java:601) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44 | 7) | at java.lang.Thread.run(Thread.java:619) | Caused by: java.lang.RuntimeException: Unexpected invocation exception: null | at org.jboss.bpm.console.server.util.InvocationProxy.invoke(InvocationPr | oxy.java:80) | at $Proxy143.provideForm(Unknown Source) | at org.jboss.bpm.console.server.FormProcessingFacade.provideForm(FormPro | cessingFacade.java:181) | at org.jboss.bpm.console.server.FormProcessingFacade.renderTaskUI(FormPr | ocessingFacade.java:120) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. | java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces | sorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl. | java:117) | at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod. | java:260) | at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232 | ) | at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166 | ) | at org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(Dispatch | erUtilities.java:142) | at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispa | tcher.java:356) | ... 28 more | Caused by: java.lang.reflect.InvocationTargetException | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. | java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces | sorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at org.jboss.bpm.console.server.util.InvocationProxy.invoke(InvocationPr | oxy.java:64) | ... 41 more | Caused by: java.lang.NullPointerException | at org.jbpm.integration.console.forms.TaskFormDispatcher.provideForm(Tas | kFormDispatcher.java:149) | at org.jbpm.integration.console.forms.FormDispatcherComposite.provideFor | m(FormDispatcherComposite.java:65) | ... 46 more | Here are the two forms. The first one is taken from one of the examples. | <html> | <body> | | <h2>How many days would you like to go on vacation?</h2> | <form action="${form.action}" method="POST" enctype="multipart/form-data"> | <select name="number_of_days"> | <option value="3">3 days</option> | <option value="5">5 days</option> | <option value="10">10 days</option> | </select><br> | | <#list outcome.values as transition> | <input type="submit" name="outcome" value="${transition}"> | </#list> | | </form> | </body> | </html> | | <html> | <body> | | <h2>[Human Resources]Do you approve the vacation request?</h2> | <form action="${form.action}" method="POST" enctype="multipart/form-data"> | <select name="acceptance_hr"> | <option value="yes">yes</option> | <option value="no">no</option> | </select><br> | | <#list outcome.values as transition> | <input type="submit" name="outcome" value="${transition}"> | </#list> | | </form> | </body> | </html> | I am kind of confused since I do not really see a difference which would explain why the first one works properly and the second one does not. Any hints? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4249896#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...