BNA get historical performance data over the REST API (BNA 12.4.2) [ Edited ]

[itisnt]

Hi Guys,

I can get all kind of information about my fabrics, san-switches over the REST API without problem, but i can't get the historical performance data. The performance stuff is enabled in the BNA and fully working. 

When i send the following URI: 

http://192.168.1.0/rest/resourcegroups/All/fcswitches/10:00:00:05:1E:67:94:00/timeseriestxframecount?granularity=GRANULARITY_MINIMUM&startdate=1487581573265&enddate=1487585173265

Python fragement:

......
connection.request('GET',
  my_url,
  headers={"WStoken":WStoken,
  "Accept":"application/vnd.brocade.networkadvisor+json;version=v1"})
.......

 i get a response code 200, so the API server accepts my request, but the payload in the answer is:

{
    "performanceDatas": [],
    "granularity": "GRANULARITY_MINIMUM",
    "duration": null,
    "startDate": 1487581573265,
    "endDate": 1487585173265
}

i tried all sorts of "timeseries..." URI, but it's always empty. 

Any idea what i'm doing wrong ?

Regards,
Daniel