diff --git a/KodiInterop/KodiInterop/Messages/RpcExitCodes.cs b/KodiInterop/KodiInterop/Messages/RpcExitCodes.cs
index 4d846da..4258008 100644
--- a/KodiInterop/KodiInterop/Messages/RpcExitCodes.cs
+++ b/KodiInterop/KodiInterop/Messages/RpcExitCodes.cs
@@ -7,6 +7,7 @@ namespace Smx.KodiInterop.Messages
     public enum RpcExitCodes
     {
 		Success = 0,
-		ResultNotSerializable = 1
+		Error = 1,
+		ResultNotSerializable = 2
     }
 }
diff --git a/csharp/rpc.py b/csharp/rpc.py
index 40f3ea1..45d3d3f 100644
--- a/csharp/rpc.py
+++ b/csharp/rpc.py
@@ -11,6 +11,10 @@
 class RPCError:
     SUCCESS = 0
     ERROR = 1
+    '''
+    eval result is not serializable/representable
+    this is not an error. it indicates that the result is a complex data type
+    '''
     RESULT_NOT_SERIALIZABLE = 2
 
 
@@ -98,12 +102,11 @@ def on_message(data):
         except TypeError as e:
             jDict['value'] = None
             jDict['exit_code'] = RPCError.RESULT_NOT_SERIALIZABLE
-            jDict['error'] = repr(e)
+            jsonData = json.dumps(jDict)
         except Exception as e:
             jDict['value'] = None
             jDict['exit_code'] = RPCError.ERROR
             jDict['error'] = repr(e)
-        finally:
             jsonData = json.dumps(jDict)
 
         return jsonData