"SOM expression returned list when single result was expected" error trying to display form

Question

Any Ideas on troubleshooting this error?
I am using ES2 SP2, on Windows.
Here is the dump from the log, sorry for the format issue, I was unable to figure out the paste option.
This is a new but complicated form with many nested subforms.
It seems to render if I save the form as a PDF, and render it with the standard Process Management "Render PDF Form" service.
If I save it as an XDP, and try to render it Reader Extended it dies like this.
Any help or Ideas are greatly appreciated.
Thanks
Mark
ALC-FRM-001-013: XMLFormFactory, PAexecute failure: "(com.adobe.document.xmlform.ReturnStatus@6c0abc13) SOM expression returned list when single result was expected"                 at com.adobe.formServer.FormServer.renderForm(FormServer.java:233)                 at com.adobe.formServer.FormServer.renderForm(FormServer.java:281)                 at com.adobe.formServer.docservice.FormsDocService.renderForm(FormsDocService.java:556)                  at com.adobe.formServer.docservice.FormsDocService.renderForm(FormsDocService.java:470)                  at com.adobe.formServer.docservice.FormsDocService.renderPDFFormCommonCaller(FormsDocService .java:164)                 at com.adobe.formServer.docservice.FormsDocService.renderPDFForm(FormsDocService.java:130)                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)                 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at com.adobe.idp.dsc.component.impl.DefaultPOJOInvokerImpl.invoke(DefaultPOJOInvokerImpl.jav a:118)                 at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequired(Ej bTransactionCMTAdapterBean.java:274)                 at sun.reflect.GeneratedMethodAccessor294.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequired(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:129)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:188)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:22 5)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.workflow.engine.PEUtil.invokeAction(PEUtil.java:885)                 at com.adobe.idp.workflow.dsc.invoker.WorkflowDSCInvoker.transientInvoke(WorkflowDSCInvoker. java:347)                 at com.adobe.idp.workflow.dsc.invoker.WorkflowDSCInvoker.invoke(WorkflowDSCInvoker.java:158)                  at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequiresNew (EjbTransactionCMTAdapterBean.java:299)                 at sun.reflect.GeneratedMethodAccessor251.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:404)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequiresNew(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:143)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:188)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:22 5)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.idp.taskmanager.dsc.service.TaskManagerServiceImpl.renderForm(TaskManagerServic eImpl.java:4646)                 at sun.reflect.GeneratedMethodAccessor12148.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at com.adobe.idp.dsc.component.impl.DefaultPOJOInvokerImpl.invoke(DefaultPOJOInvokerImpl.jav a:118)                 at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequiresNew (EjbTransactionCMTAdapterBean.java:299)                 at sun.reflect.GeneratedMethodAccessor251.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:404)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequiresNew(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:143)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:165)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:19 8)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.invokeWithRetry2(TypedTaskMa nagerService.java:159)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.invokeWithRetry(TypedTaskMan agerService.java:147)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.callRenderService(TypedTaskM anagerService.java:1441)                 at com.adobe.workspace.tasks.TaskActions.render(TaskActions.java:768)                 at sun.reflect.GeneratedMethodAccessor1264.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at flex.messaging.services.remoting.adapters.JavaAdapter.invoke(JavaAdapter.java:421)                  at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)                  at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1406)                  at flex.messaging.AsyncMessageBroker.routeMessageToService(AsyncMessageBroker.java:571)                  at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:1005)                  at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:103)                  at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)                 at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)                 at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)                  at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:165)                  at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:293)                  at flex.messaging.MessageBrokerServlet.service(MessageBrokerServlet.java:364)                  at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)                 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:290)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at com.adobe.workspace.events.RemoteEventClientLifeCycle.doFilter(RemoteEventClientLifeCycle .java:152)                 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:235)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:235)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)                  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)                  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.ja va:179)                 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)                  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)                  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)                  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java: 157)                 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)                  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)                  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)                  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.ja va:580)                 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)                 at java.lang.Thread.run(Unknown Source) 2012-01-09 14:58:17,178 INFO  [STDOUT] [LCDS][ERROR] Exception when invoking service 'remoting-service': flex.messaging.MessageException: ALC-WKS-005-028: A problem occurred in the Render Service for Task "8258".  Please review the render orchestration for this process.   incomingMessage: Flex Message (flex.messaging.messages.RemotingMessage)     operation = render     parameters = [44F8A32C-A8D6-102E-B9D6-00000A3085AB, 8258, 0, ASObject(242517833){acrobatVersion=10.0., acroClientType=}]     clientId = D3292091-580B-C7E7-38E3-8E9ECB817F50     destination = task-actions     messageId = 590434A1-5953-17C9-55C4-C443A2F281A3     timestamp = 1326142694104     timeToLive = 0     body = null     hdr(DSId) = D30D08B0-BD1F-B9A8-DCF0-9414276B403E     hdr(DSEndpoint) = workspace-polling-amf   Exception: flex.messaging.MessageException: ALC-WKS-005-028: A problem occurred in the Render Service for Task "8258".  Please review the render orchestration for this process.                 at com.adobe.workspace.AssemblerUtility.createMessageException(AssemblerUtility.java:412)                  at com.adobe.workspace.tasks.TaskActions.render(TaskActions.java:822)                 at sun.reflect.GeneratedMethodAccessor1264.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at flex.messaging.services.remoting.adapters.JavaAdapter.invoke(JavaAdapter.java:421)                  at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)                  at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1406)                  at flex.messaging.AsyncMessageBroker.routeMessageToService(AsyncMessageBroker.java:571)                  at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:1005)                  at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:103)                  at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)                 at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)                 at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)                  at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:165)                  at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:293)                  at flex.messaging.MessageBrokerServlet.service(MessageBrokerServlet.java:364)                  at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)                 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:290)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at com.adobe.workspace.events.RemoteEventClientLifeCycle.doFilter(RemoteEventClientLifeCycle .java:152)                 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:235)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)                  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:235)                 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)                  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)                  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)                  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.ja va:179)                 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)                  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)                  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)                  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java: 157)                 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)                  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)                  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)                  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.ja va:580)                 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)                 at java.lang.Thread.run(Unknown Source) Caused by: com.adobe.idp.taskmanager.dsc.client.task.TaskManagerException: Error Invoking render Operation For (taskId, formId):(8258 ,0).  Error Message is: ALC-FRM-001-013: XMLFormFactory, PAexecute failure: "(com.adobe.document.xmlform.ReturnStatus@6c0abc13) SOM expression returned list when single result was expected"                 at com.adobe.formServer.FormServer.renderForm(FormServer.java:233)                 at com.adobe.formServer.FormServer.renderForm(FormServer.java:281)                 at com.adobe.formServer.docservice.FormsDocService.renderForm(FormsDocService.java:556)                  at com.adobe.formServer.docservice.FormsDocService.renderForm(FormsDocService.java:470)                  at com.adobe.formServer.docservice.FormsDocService.renderPDFFormCommonCaller(FormsDocService .java:164)                 at com.adobe.formServer.docservice.FormsDocService.renderPDFForm(FormsDocService.java:130)                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)                 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at com.adobe.idp.dsc.component.impl.DefaultPOJOInvokerImpl.invoke(DefaultPOJOInvokerImpl.jav a:118)                 at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequired(Ej bTransactionCMTAdapterBean.java:274)                 at sun.reflect.GeneratedMethodAccessor294.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequired(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:129)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:188)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:22 5)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.workflow.engine.PEUtil.invokeAction(PEUtil.java:885)                 at com.adobe.idp.workflow.dsc.invoker.WorkflowDSCInvoker.transientInvoke(WorkflowDSCInvoker. java:347)                 at com.adobe.idp.workflow.dsc.invoker.WorkflowDSCInvoker.invoke(WorkflowDSCInvoker.java:158)                  at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequiresNew (EjbTransactionCMTAdapterBean.java:299)                 at sun.reflect.GeneratedMethodAccessor251.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:404)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequiresNew(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:143)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:188)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:22 5)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.idp.taskmanager.dsc.service.TaskManagerServiceImpl.renderForm(TaskManagerServic eImpl.java:4646)                 at sun.reflect.GeneratedMethodAccessor12148.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at com.adobe.idp.dsc.component.impl.DefaultPOJOInvokerImpl.invoke(DefaultPOJOInvokerImpl.jav a:118)                 at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.execute(EjbTr ansactionCMTAdapterBean.java:357)                 at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterBean.doRequiresNew (EjbTransactionCMTAdapterBean.java:299)                 at sun.reflect.GeneratedMethodAccessor251.invoke(Unknown Source)                 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)                 at java.lang.reflect.Method.invoke(Unknown Source)                 at org.jboss.invocation.Invocation.performCall(Invocation.java:359)                 at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:237)                 at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:158)                 at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:169)                 at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)                  at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)                  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:404)                  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)                 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)                  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)                 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:138)                 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)                 at org.jboss.ejb.Container.invoke(Container.java:960)                 at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)                  at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)                  at $Proxy173.doRequiresNew(Unknown Source)                 at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:143)                 at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:165)                 at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)                  at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)                 at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:115)                  at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)                 at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:19 8)                 at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)                 at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.invokeWithRetry2(TypedTaskMa nagerService.java:159)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.invokeWithRetry(TypedTaskMan agerService.java:147)                 at com.adobe.idp.taskmanager.dsc.client.TypedTaskManagerService.callRenderService(TypedTaskM anagerService.java:1441)                 at com.adobe.workspace.tasks.TaskActions.render(TaskActions.java:768)                 ... 37 more

Answer 1

It appears the form had incorrect bindings for a list object that resulted in recursion.
Once the bindings were corrected the form works properly
F.Y.I.
Mark