Steps I followed:
- First create corpus, then send create a document in it.
 Check if the processing of the document is ready (done processing)
https://gateway.watsonplatform.net/concept-insights/api/v2/corpora/{account-id}/{corpus-name}/documents/{document-name}/processing_stateIf it is ready then i retrieve the related_concepts in the document
https://gateway.watsonplatform.net/concept-insights/api/v2/corpora/{account-id}/{corpus-name}/documents/{document-name}/related_concepts
All the above steps are working (I get a 200/201 reply from Bluemix server).
The problem is in the reply of step 2. I keep getting the following response
{ "status": "processing", "last_modified": "2015-11-10T15:27:12.473Z" }
But when I do step 3, I am getting the desired response (the related concepts in the document)
  { 
     "concepts" : [ 
         {
            "score" : ...,
            "concept" : {
                "id": "........",
                "label": ".....
             }
          }, .....
      ]
  }
UPDATE
The processing_state API problem has been fixed. Gives the desired response