<div>When i open TV Server config, and edit a setting on 1 of my tuners, then close that window &gt; the TvService gets restarted and only 1 card is visible inside the navigation tree.</div><div>When i edit another setting (on any card), after the auto restart of the TvService, all cards are back in the navigation tree.</div><div><br /></div><div>Logs shows:</div><div>[2013-10-19 13:10:23,629] [Log &nbsp; &nbsp;] [SetupTv &nbsp;] [ERROR] - Exception &nbsp; :System.NullReferenceException: Object reference not set to an instance of an object.</div><div>&nbsp; &nbsp;at SetupTv.SetupTvSettingsForm.RemoveAllChildSections(SectionTreeNode parentTreeNode)</div><div>&nbsp; &nbsp;at SetupTv.SetupTvSettingsForm.RemoveAllChildSections(SectionTreeNode parentTreeNode)</div><div>&nbsp; &nbsp;at SetupTv.SetupTvSettingsForm.OnTvCardsChanged(Object sender, EventArgs e)</div><div>&nbsp; &nbsp;at SetupTv.Sections.TvCards.OnChanged(Object sender, EventArgs e)</div><div>&nbsp; &nbsp;at SetupTv.Sections.TvCards.OnSectionDeActivated()</div><div>&nbsp; &nbsp;at SetupTv.SetupTvSettingsForm.ActivateSection(SectionSettings section)</div><div><br /></div>