diff --git a/BoerseDataConvert/BoerseDataConvert/Controller/RecordController.cs b/BoerseDataConvert/BoerseDataConvert/Controller/RecordController.cs
index d51eba4..891bda5 100644
--- a/BoerseDataConvert/BoerseDataConvert/Controller/RecordController.cs
+++ b/BoerseDataConvert/BoerseDataConvert/Controller/RecordController.cs
@@ -68,6 +68,7 @@ namespace BoerseDataConvert
                 }
                 else
                 {
+                    if (value == "") return tagname;
                     try
                     {
                         double.Parse(value);