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Large project in progress. Many transcribed interviews and currently 2000 nodes! Applied all the optimisation tricks. Upgraded to Windows 10. Increased RAM to 12GB. Occurs on different computer. Basically when I copy and merge nodes (as part of sorting), randomly NVivo10 will stop responding. Sometimes this is with just a couple of small nodes being merged. When NVivo fails/crashes/lags for me, CPU and Memory usage still seem low. Recent error code also included. Anyone else encountered this? Mathew Version = 10.0.638.0 Exception = System.InvalidOperationException Message = This SqlTransaction has completed; it is no longer usable. FullText = System.InvalidOperationException: This SqlTransaction has completed; it is no longer usable. at System.Data.SqlClient.SqlTransaction.ZombieCheck() at System.Data.SqlClient.SqlTransaction.Save(String savePointName) at hg.b(String aSavePointName) at eh.d() at eh.b(ie A_0) at QSR.NVivo.Client.Presentation.Forms.NVivoApplication.StartBusinessTransaction(ie A_0) at QSR.NVivo.Client.Presentation.Controls.CodingStripesColumnsControl.f() at QSR.NVivo.Client.Presentation.Controls.CodingStripesColumnsControl.a(Object A_0, ToolClickEventArgs A_1) at Infragistics.Win.UltraWinToolbars.ToolClickEventHandler.Invoke(Object sender, ToolClickEventArgs e) at QSR.NVivo.Client.Presentation.Forms.NodeDetailForm.a(Object A_0, ToolClickEventArgs A_1) at QSR.NVivo.Client.Presentation.Forms.NVivoApplication.OnToolClick(Control A_0, Object A_1, ToolClickEventArgs A_2) at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.OnToolClick(ToolClickEventArgs e) at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FireEvent(ToolbarEventIds id, EventArgs e) at Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.DoClickProcessing(MouseEventArgs e) at Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.OnMouseUp(MouseEventArgs e) at Infragistics.Win.ControlUIElementBase.ProcessMouseUpHelper(Object sender, MouseEventArgs e) at Infragistics.Win.ControlUIElementBase.ProcessMouseUp(Object sender, MouseEventArgs e) at Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e) at Infragistics.Win.UltraControlBase.OnMouseUp(MouseEventArgs e) at Infragistics.Win.UltraWinToolbars.PopupControlBase.OnMouseUp(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at QSR.NVivo.Client.Presentation.Forms.Program.b(String[] A_0) at QSR.NVivo.Client.Presentation.Forms.Program.c(String[] A_0)

In comparative analysis having these displayed is very handy, but it really slows NVivo. Possibly unsolvable!