well, i try to create a NonVisualTable with a group and schema and the subscription mode is COMMAND, when i try to run this an alert show me with this message

1: 18:18:46,590 ER addTable Key position is not set correctly for a COMMAND mode subscription. Please specify a field that represents the Key
when i change the mode to MERGE this work fine.

i'm not sure about the subscription mode operation, i read the document General Concepts, and not finish to understand, can you explain me??

about the obtain the message with a java script function, it's done
the problem is how to conver my string to json.
is there a way to pass a json parameter instead a string??

regards