Response failures

Status code Reason for failure HTTP error message returned
401 The authentication failed. 
HTTP/1.1 401 Unauthorized
Server: Apache-Coyote/1.1
Content-Type: text/plain;charset=UTF-8
Content-Length: 77
Date: Mon, 10 Feb 2014 22:47:58 GMT
 
The resource requires authentication, which was not 
supplied with the request
422 The API version included in the JSON payload for workflow variables does not exist. 
HTTP/1.1 422 Unprocessable Entity
Server: Apache-Coyote/1.1
Content-Type: text/plain;charset=UTF-8
Content-Length: 22
Date: Tue, 11 Feb 2014 18:52:43 GMT
 
invalid API version: 2
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