Tab must be part of the Tabs collection System.NotSupportedException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Infragistics.Win -2146233067 SDL Trados Studio 15.0.0.0 15.0.1.36320 Microsoft Windows 8.1 Pro NULL 1031 1252 Trados\rthone 4.0.30319.42000 TRADOS True 6221364 MB