Problem with QueueUpdateProject (PSI)

Server stack trace:

  at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)

  at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)

  at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)

  at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)

  at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:

  at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

  at EPM.SvcProject.Project.QueueUpdateProject(Guid jobUid, Guid sessionUid, ProjectDataSet dataset, Boolean validateOnly)

  at EPM.SvcProject.ProjectClient.QueueUpdateProject(Guid jobUid, Guid sessionUid, ProjectDataSet dataset, Boolean validateOnly)

  at EPM.Connection.PSIHandler.UpdateProject(Project proj, DateTime sync, Guid sessionId)

I can't find anything related to this. Sometimes, just before using the QueueUpdateProject I use theQueueAddToProject method with no problem. In addition, the server I'm using was a test server (before it was promoted to production) and everything worked fine.

I checked the ULS log and this is the only error I found (I'm not sure it is related) at a close time to the error I got:

Leaving Monitored Scope (ExecuteWcfServerOperation). Execution Time=4.05414654655829

Detected use of SPRequest for previously closed SPWeb object.  Please close SPWeb objects when you are done with all objects obtained from them, but not before.  Stack trace:    at Microsoft.SharePoint.SPWeb.get_CurrentUser()     at Microsoft.Office.Project.PWA.PJContext.get_RegionalSettings()     at Microsoft.Office.Project.PWA.PJContext.get_LocaleCulture()     at Microsoft.Office.Project.PWA.WCFContext.AuthenticateUser(Message message, WCFContext& wcfContext, String userName, Boolean isWindowsUser)     at Microsoft.Office.Project.PWA.WCFContext.GetContext(Message message, String userName, Boolean isWindowsUser, Boolean newCookie, Uri originalTargetUri)     at Microsoft.Office.Project.Server.ProjectServerRouter.Microsoft.Office.Project.Server.IProjectServerRouter.ProcessMessage(Message message)     at SyncInvokeProcessMessage(Object , Object[] , Object[] )     at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)     at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)     at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)     at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc)     at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)     at System.ServiceModel.Dispatcher.ChannelHandler.DispatchAndReleasePump(RequestContext request, Boolean cleanThread, OperationContext currentOperationContext)     at System.ServiceModel.Dispatcher.ChannelHandler.HandleRequest(RequestContext request, OperationContext currentOperationContext)     at System.ServiceModel.Dispatcher.ChannelHandler.AsyncMessagePump(IAsyncResult result)     at System.ServiceModel.Diagnostics.Utility.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)     at System.ServiceModel.AsyncResult.Complete(Boolean completedSynchronously)     at System.ServiceModel.Channels.InputQueue`1.AsyncQueueReader.Set(Item item)     at System.ServiceModel.Channels.InputQueue`1.EnqueueAndDispatch(Item item, Boolean canDispatchOnThisThread)     at System.ServiceModel.Channels.InputQueue`1.EnqueueAndDispatch(T item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)     at System.ServiceModel.Channels.InputQueueChannel`1.EnqueueAndDispatch(TDisposable item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)     at System.ServiceModel.Channels.SingletonChannelAcceptor`3.Enqueue(QueueItemType item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)     at System.ServiceModel.Channels.SingletonChannelAcceptor`3.Enqueue(QueueItemType item, ItemDequeuedCallback dequeuedCallback)     at System.ServiceModel.Channels.HttpChannelListener.HttpContextReceived(HttpRequestContext context, ItemDequeuedCallback callback)     at System.ServiceModel.Activation.HostedHttpTransportManager.HttpContextReceived(HostedHttpRequestAsyncResult result)     at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.BeginRequest()     at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.OnBeginRequest(Object state)     at System.ServiceModel.PartialTrustHelpers.PartialTrustInvoke(ContextCallback callback, Object state)     at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.OnBeginRequestWithFlow(Object state)     at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke2()     at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke()     at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ProcessCallbacks()     at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.CompletionCallback(Object state)     at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ScheduledOverlapped.IOCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)     at System.ServiceModel.Diagnostics.Utility.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)     at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP) 

Any Ideas?

Thanks,

ID