Windows 7 Pro
Bizhawk 1.9.1 svn 8272
This just happened to me after closing Majora's Mask using the Close Rom option:
************** Exception Text **************
System.InvalidCastException: Unable to cast object of type 'BizHawk.Emulation.Common.NullEmulator' to type 'BizHawk.Emulation.Common.IMemoryDomains'.
at BizHawk.Client.EmuHawk.RamWatch.Restart()
at BizHawk.Client.EmuHawk.ToolManager.<Restart>b__9(IToolForm x)
at System.Collections.Generic.List`1.ForEach(Action`1 action)
at BizHawk.Client.EmuHawk.ToolManager.Restart()
at BizHawk.Client.EmuHawk.MainForm.CloseRom(Boolean clearSram)
at BizHawk.Client.EmuHawk.MainForm.CloseRomMenuItem_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.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.ToolStripDropDown.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.ToolStripDropDown.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)
Addresses watched
Domain RDRAM
SystemID N64
1EF6A7 b u 1 RDRAM Life
1EF6A9 b u 1 RDRAM Magic
1EF711 b u 1 RDRAM Arrows ?
1EF716 b u 1 RDRAM Bombs
1EF717 b u 1 RDRAM Bombchu
1EF718 b u 1 RDRAM Deku Sticks
1EF719 b u 1 RDRAM Deku Nuts
1EF71A b u 1 RDRAM Magic Beans
BizHawk was able to continue running.