In my system, I create a custom audience - data file - mobile advertiser ids with 10k user.

After I created it, I refreshed API link to get information about the audience which I've just created: https://graph.facebook.com/act_xxx/customaudiences?fields=id,account_id,name,lookalike_spec,retention_days,subtype,approximate_count,rule,delivery_status,operation_status,data_source,permission_for_actions&limit=500&access_token=xxx.

(After breaking change in October 2014, status field not return. So I see operation_status)

I see that:

"operation_status": { "code": 410, "description": "No file has been uploaded for this audience, or the previous upload has failed due to system error. Please try uploading the file again." }

But after about 10s, I refresh again, and operation_status change to: "operation_status": { "code": 200, "description": "Normal" }

My quetions is: how to check this audience's status is waiting ( uploading file) , like when I create on facebook not my our system.

Thanks for all anwser.