diff --git a/VectoCore/VectoCore/Utils/XMLValidator.cs b/VectoCore/VectoCore/Utils/XMLValidator.cs
index a13f8f2113f5ed0501ceb43979d10e8e1683d069..5ddb86d20d5b845484b1068a7148a6dbf816d48b 100644
--- a/VectoCore/VectoCore/Utils/XMLValidator.cs
+++ b/VectoCore/VectoCore/Utils/XMLValidator.cs
@@ -129,7 +129,7 @@ namespace TUGraz.VectoCore.Utils
 		public static void CallBackExceptionOnError(XmlSeverityType severity, ValidationEvent evt)
 		{
 			if (severity == XmlSeverityType.Error) {
-				throw new VectoException("Validation error: {0}", evt.ValidationEventArgs.Message);
+				throw new VectoException("Validation error: {0}", evt.ValidationEventArgs?.Message ?? evt.Exception?.Message);
 			}
 		}