Poll the status of your export task and repeat until the task is complete. 

The possible states of a task are:

StateDescription
NOT_STARTEDScheduled but not started.
IN_PROGRESSCurrently running.
COMPLETEDone, either successfully or not.
CANCELLINGCancellation has begun but not yet complete.
CANCELLEDCancellation complete and any changes are rolled back.
GET

https://api.anaplan.com/2/0/workspaces/{workspaceID}/models/{modelID}/exports/{exportID}/tasks/{taskID}

ParameterDescription
AnaplanAuthToken:{token}Your Anaplan authentication token value.
workspaceIDThe workspace ID
modelIDThe model ID
exportIDThe export ID
taskIDThe ID for your export task

curl -X GET \ https://api.anaplan.com/2/0/workspaces/0a800b00e0000000f000001eab0d0000/models/F1111111C11111111B11111F1111E11F/exports/116000000005/tasks/8FEEA107FF67414E855084A7698D3C7C \ -H 'authorization: AnaplanAuthToken {token}' \ -H "Content-Type:application/json"

{

   "meta":{

      "schema":"https://api.anaplan.com//2/0/models/F1111111C11111111B11111F1111E11F/objects/task"

   },

   "status":{

      "code":200,

      "message":"Success"

   },

   "task":{

      "type":"taskInformation",

      "taskId":"BFEC582EBD4146068FE4061831C8F0F0",

      "currentStep":"Complete.",

      "progress":1,

      "result":{

         "failureDumpAvailable":false,

         "objectId":"116000000002",

         "successful":true

      },

      "taskState":"COMPLETE"

   }

}