System.NullReferenceException: Object reference not set to an instance of an object.
   at VpxClient.HostConfig.DatastoresAndVolumes.Util.GetSizeInBytes(VmfsDatastoreOption option)
   at VpxClient.HostConfig.DatastoresAndVolumes.DiskLunFormattingPg.GetSizeInGB(VmfsDatastoreOption option)
   at VpxClient.HostConfig.DatastoresAndVolumes.DiskLunFormattingPg.GetOptionSizeInGB(VmfsDatastoreOption option)
   at VpxClient.HostConfig.DatastoresAndVolumes.DiskLunFormattingPg.mMaxCapCheckBox_CheckedChanged(Object sender, EventArgs e)
   at System.Windows.Forms.CheckBox.OnCheckedChanged(EventArgs e)
   at System.Windows.Forms.CheckBox.set_CheckState(CheckState value)
   at System.Windows.Forms.CheckBox.OnClick(EventArgs e)
   at System.Windows.Forms.CheckBox.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.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)