diff --git a/S7.Net/PLCHelpers.cs b/S7.Net/PLCHelpers.cs
index 7525ff2..ab59d2c 100644
--- a/S7.Net/PLCHelpers.cs
+++ b/S7.Net/PLCHelpers.cs
@@ -154,7 +154,7 @@ namespace S7.Net
                             varType = VarType.Counter;
                             return;
                         default:
-                            throw new InvalidAddressException(string.Format("{0} is not av valid address", address.Substring(0, 1)));
+                            throw new InvalidAddressException(string.Format("{0} is not a valid address", address.Substring(0, 1)));
                     }
 
                     string txt2 = address.Substring(1);
@@ -248,7 +248,7 @@ namespace S7.Net
         /// <returns></returns>
         private object ParseBytes(VarType varType, byte[] bytes, int varCount, byte bitAdr = 0)
         {
-            if (bytes == null)
+            if (bytes == null || bytes.Length == 0)
                 return null;
 
             switch (varType)
@@ -352,10 +352,10 @@ namespace S7.Net
         }
 
 
-    /// <summary>
-    /// Sets the <see cref="LastErrorCode"/> to <see cref="ErrorCode.NoError"/> and <see cref="LastErrorString"/> to <see cref="string.Empty"/>.
-    /// </summary>
-    public void ClearLastError()
+        /// <summary>
+        /// Sets the <see cref="LastErrorCode"/> to <see cref="ErrorCode.NoError"/> and <see cref="LastErrorString"/> to <see cref="string.Empty"/>.
+        /// </summary>
+        public void ClearLastError()
         {
             LastErrorCode = ErrorCode.NoError;
             LastErrorString = string.Empty;