DELIVERY ERROR CODES
| No. | Error Code | Error Message | 
| 1. | 1000 | Invalid argument from request. | 
| 2. | 1001 | API key is invalid. | 
| 3. | 1002 | Delivery with D.O. # already exists on requested date. | 
| 4. | 1003 | Delivery with D.O. # not found on requested date. | 
| 5. | 1004 | Delivery with D.O. # not editable. | 
| 6. | 1005 | Delivery with D.O. # not deletable. | 
SAMPLE ERROR RESPONSE JSON #1
{
   "info":{
      "status":"failed",
      "error":{
         "code":1001,
         "message":"API key is invalid"
      }
   }
}SAMPLE ERROR RESPONSE JSON #2
{
   "info":{
      "status":"ok",
      "failed":1
   },
   "results":[
      {
         "date":"2014-02-13",
         "do":"DO140213001",
         "status":"failed",
         "errors":[
            {
               "code":1002,
               "message":"Delivery with D.O. # DO140213001 already exists on 2014-02-13."
            }
         ]
      }
   ]
}
