2860666 - Web SAP GUI Logon appears when opening AO / EPM workbooks from BPF BPC Web

• When trying to open an Analysis for Office - Analysis Plug-in or EPM Add-in report via a BPC Business Process Flow (BPF), the SAP NW logon screen login appears.
• This would raise the following errors : "Could not connect" or "Logon dialogue was closed", but the report may be loaded correctly.
• The same error occurs when launching the EPM Add-in from the link in the right bottom corner of BPC Web.
• From AO application, the 2 options "Allow Client and Language Selection for SSO Logon" and "Force Logon Window for SSO Logon on BIP" have been turned off
• This error may also appear in the AO trace file:
  |ERROR|Trace.BPFPlugIn|BPFPlugIn.Services.Session.BpcConnectDelegate.DoTask|VSTA_Main|Couldn't connect.System.Net.WebException: The remote server returned an error: (401) Unauthorized.
     at System.Net.HttpWebRequest.GetResponse()
     at BPFPlugIn.Services.Session.BpcEmbeddedSession.InternalConnect()
     at BPFPlugIn.Services.Session.BpcSession.Connect()  
     at BPFPlugIn.Services.Session.BpcConnectDelegate.DoTask(IBpcSession session)
  #

  |ERROR|BPFPlugIn.Notification|BPFPlugIn.Model.Notification.BpfNotification.Log|VSTA_Main|Logon dialog was closedSystem.OperationCanceledException: Logon dialog was closed
     at Com.Sap.Cof.ConnectionService.Http.Nw.NwHttpSession.Initialize()
     at Com.Sap.Cof.ConnectionService.Http.Nw.NwHttpConnectionManager.CreateSession(IHttpDestination destination)
     at BpfCofPlugin.Utilities.BpfConnectionOrchestrator.BuildConnectionInfo(BpfConnection connection)
     at BpfCofPlugin.BpfOfficePlugin.NotifyBpfContext(BpfConnectionInfo connectionInfo, BpfActionContext actionContext)
  #

• SAP Business Planning and Consolidation 10.x, version for SAP NetWeaver
• SAP Analysis for Microsoft Office 2.x
• SAP EPM Add-in for Microsoft Office

SAP_RSADMIN_MAINTAIN, BICS_INA_ALLOW_UNSECURE_COMM, , KBA , BW-PLA-BPC , BPC 'embedded model' , EPM-BPC-NW , NetWeaver Version , BI-RA-AO-XLA , Excel Addin , BW-BEX-OT-AGGR , Aggregates (Definition and Filling) , Problem