bad response from server

[SmileGobo]

when server answer success - reponse have field "error" when server answer error - response have field "result"

result This member is REQUIRED on success. This member MUST NOT exist if there was an error invoking the method. The value of this member is determined by the method invoked on the Server. error This member is REQUIRED on error. This member MUST NOT exist if there was no error triggered during invocation. The value for this member MUST be an Object as defined in section 5.1.

http://www.jsonrpc.org/specification