All of the measurements of concern are labeled "short_query_experiment" in their "description" field. I am attempting to perform "ping" measurements, resolved on probe, towards a number of common domains. 

More details: All of the measurements indefinitely return a status of "{"error":{"status":403,"code":104,"detail":"This measurement hasn't yet started or is no longer running","title":"Forbidden"}}" (never done), even if the measurement is in face performed and has results, which makes it very difficult to determine when a measurement has been successfully deployed. 

On Mon, Apr 23, 2018 at 4:30 PM Randy Bush <randy@psg.com> wrote:

> All of my RIPE Atlas measurement requests (pings in this case) are
> suddenly failing with a status "title" field value "Forbidden". Why is
> this happening?

you might get a better answer if you identified the experiment

randy