On Thu, Jul 19, 2018 at 10:47:54AM -0500, Yihao Jia <yhjia03@gmail.com> wrote a message of 192 lines which said:

I am a little confused because all example on documents is one-off. I guess error might happen around "is_oneoff", "interval", "spread". source code for this test is below and in the attachment.

"is_oneoff" is off by default. "interval" is documented as "In normal (not one-off) measurements, this value represents the number of seconds between measurements by a single probe." I never tried "spread". I don't know the exact JSON you sent but this one worked (5 minutes, 1 minute between each test): {'definitions': [{'target': 'fr-ilm-as57119.anchors.atlas.ripe.net', 'af': 4, 'interval': 60, 'packets': 1, 'type': 'ping', 'description': 'Ping fr-ilm-as57119.anchors.atlas.ripe.net'}], 'start_time': 1532026200, 'stop_time': 1532026500, 'probes': [{'requested': 1, 'type': 'area', 'value': 'WW'}]} And it gave this measurement: https://atlas.ripe.net/measurements/15297080/