Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index System.ArgumentOutOfRangeException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 index mscorlib -2146233086 SDL Trados Studio 15.0.0.0 15.2.0.1041 Microsoft Windows 10 Pro NULL 1033 1253 PC\spiros 4.0.30319.42000 PC True 16725712 MB