diff --git a/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/XMLDeclarationAirdragDataProvider.cs b/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/XMLDeclarationAirdragDataProvider.cs
index 5f09cd70afed282a71a28a8e3990f15090cdf75b..1e56a67ce8d50b22bbff2b4ebe6835c1d0383e19 100644
--- a/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/XMLDeclarationAirdragDataProvider.cs
+++ b/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/XMLDeclarationAirdragDataProvider.cs
@@ -55,7 +55,7 @@ namespace TUGraz.VectoCore.InputData.FileIO.XML.Declaration
 
 		public SquareMeter AirDragArea
 		{
-			get { return GetDoubleElementValue(XMLNames.AirDrag_DeclaredCdxA).SI<SquareMeter>(); }
+			get { return ElementExists(XMLNames.AirDrag_DeclaredCdxA) ? GetDoubleElementValue(XMLNames.AirDrag_DeclaredCdxA).SI<SquareMeter>() : null; }
 		}
 	}
 }
\ No newline at end of file
diff --git a/VectoCore/VectoCore/Utils/VectoCSVFile.cs b/VectoCore/VectoCore/Utils/VectoCSVFile.cs
index e8f80acb30f780639f56d9ae6246bfe0a8ea99ed..0b8477558c073d8a439dca0df9cf70e0bb17c8f1 100644
--- a/VectoCore/VectoCore/Utils/VectoCSVFile.cs
+++ b/VectoCore/VectoCore/Utils/VectoCSVFile.cs
@@ -35,10 +35,8 @@ using System.Data;
 using System.Globalization;
 using System.IO;
 using System.Linq;
-using System.Reflection;
 using System.Text;
 using System.Text.RegularExpressions;
-using DocumentFormat.OpenXml.Spreadsheet;
 using TUGraz.VectoCommon.Exceptions;
 using TUGraz.VectoCommon.InputData;
 using TUGraz.VectoCommon.Models;