diff --git a/Stundensheet.xlsx b/Stundensheet.xlsx
index 09b59fb8..a9ba985e 100644
Binary files a/Stundensheet.xlsx and b/Stundensheet.xlsx differ
diff --git a/nsw/Source/bsmd.ExcelReadService/LocodeDB.cs b/nsw/Source/bsmd.ExcelReadService/LocodeDB.cs
index 765b804c..2b4194ad 100644
--- a/nsw/Source/bsmd.ExcelReadService/LocodeDB.cs
+++ b/nsw/Source/bsmd.ExcelReadService/LocodeDB.cs
@@ -114,7 +114,8 @@ namespace bsmd.ExcelReadService
             IDataReader reader = cmd.ExecuteReader();
             while (reader.Read())
             {
-                result = reader.GetString(0);
+                if(!reader.IsDBNull(0))
+                    result = reader.GetString(0);
                 break;
             }
             reader.Close();
diff --git a/nsw/Source/bsmd.database/Properties/AssemblyProductInfo.cs b/nsw/Source/bsmd.database/Properties/AssemblyProductInfo.cs
index ca558df8..faa485ff 100644
--- a/nsw/Source/bsmd.database/Properties/AssemblyProductInfo.cs
+++ b/nsw/Source/bsmd.database/Properties/AssemblyProductInfo.cs
@@ -2,6 +2,6 @@
 
 [assembly: AssemblyCompany("Informatikbüro Daniel Schick")]
 [assembly: AssemblyProduct("BSMD NSW interface")]
-[assembly: AssemblyInformationalVersion("3.5.7")]
+[assembly: AssemblyInformationalVersion("3.5.8")]
 [assembly: AssemblyCopyright("Copyright ©  2014-2017 Informatikbüro Daniel Schick. All rights reserved.")]
 [assembly: AssemblyTrademark("")]
\ No newline at end of file
diff --git a/nsw/Source/bsmd.database/Properties/AssemblyProjectInfo.cs b/nsw/Source/bsmd.database/Properties/AssemblyProjectInfo.cs
index 69abcd44..1ee2daf5 100644
--- a/nsw/Source/bsmd.database/Properties/AssemblyProjectInfo.cs
+++ b/nsw/Source/bsmd.database/Properties/AssemblyProjectInfo.cs
@@ -1,4 +1,4 @@
 using System.Reflection;
 
-[assembly: AssemblyVersion("3.5.7.*")]
+[assembly: AssemblyVersion("3.5.8.*")]