diff --git a/ErgometerLibrary/Meting.cs b/ErgometerLibrary/Meting.cs
index d65391e..0f2fba6 100644
--- a/ErgometerLibrary/Meting.cs
+++ b/ErgometerLibrary/Meting.cs
@@ -70,7 +70,7 @@ namespace ErgometerLibrary
             string[] status = input.Split(delimiter);
             if (status.Length != 8 && status.Length != 9)
             {
-                return null;
+                throw new FormatException("Error in Meting: Arguments do not match");
             }
             int heartbeat = int.Parse(status[0]);
             int rpm = int.Parse(status[1]);
diff --git a/ErgometerLibrary/NetCommand.cs b/ErgometerLibrary/NetCommand.cs
index 3fc805f..6bf167e 100644
--- a/ErgometerLibrary/NetCommand.cs
+++ b/ErgometerLibrary/NetCommand.cs
@@ -22,7 +22,7 @@ namespace ErgometerLibrary
         public ValueType Value { get; set; }
         public RequestType Request { get; set; }
         public LengthType Length { get; set; }
-        public double SetValue { get; set; }
+        public int SetValue { get; set; }
         public string DisplayName { get; set; }
         public bool IsDoctor { get; set; }
         public string Password { get; set; }