Error

[Catalonia]

When I resize a map say this. Why?

Application: World Builder
User: Unkown (Not an in-house user.)
Time: Saturday 28/01/2012 12:40:51

Runtime: 32 bit
OS: Windows 2008 (Service Pack 1)
Machine: PORTATIL-GVG

Exception: System.AccessViolationException
Source: WorldBuilderEngine
Thread: Main Thread
Description: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Stack Trace:
   at CvWorldBuilderMapElementAllocator<CvWorldBuilderMap::UnitName,4>.Alloc(CvWorldBuilderMapElementAllocator<CvWorldBuilderMap::UnitName\,4>* , Handle* )
   at WorldBuilderEngine.MapResizer.DoResize()
   at WorldBuilderEngine.MapResizer.set_DestinationMap(Map pmValue)
   at WorldBuilder.MapResizerUI.set_Destination(Map value)
   at WorldBuilder.BuildScreen.m_btnResizeMap_Click(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)