Unhandled exception - just in time debugging

Discussion created by jaygis on Jul 12, 2012
Latest reply on Jul 13, 2012 by agray1
I have an application (extension) that works fine on Windows XP platform. When I run this application on Windows 7 it throws this error. I am not sure what is causing this. I was thinking that it could be due to the fact that .net framework is not installed but I can see all in there. Looking for any ideas to resolve this issue.

Note: this error comes up when I click on a combox box. How can i get past this message box and get to actual error.

Thanks Jay

See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.

***** Exception Text ******* System.NullReferenceException: Object reference not set to an instance of an object. at MapExt_Net.HEI_Extensions.layout.frmLayout.DisplaySize() at MapExt_Net.HEI_Extensions.layout.frmLayout.cBLayoutExtent_SelectedIndexChanged(Object sender, EventArgs e) at System.Windows.Forms.ComboBox.OnSelectedIndexChanged(EventArgs e) at System.Windows.Forms.ComboBox.WmReflectCommand(Message& m) at System.Windows.Forms.ComboBox.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)