Blank response on data request from Feed API

Hi All,

 

I've had some luck with the API's over the past few weeks but with one particular query I am struggling.  I am issuing this command

http://emoncms.org/feed/data.json?id=55930&start=1451019600&end=14536980...

And the response is just

[]
 

I have tried various start/end times, various dp values, and tried using interval as well.  The feed is a DAILY/PHPTIMESERIES feed.

If I pull the same feed through csv I get data back

http://emoncms.org/feed/csvexport.json?id=55930&start=1451019600&end=145...

 

Any ideas what I am doing wrong?

 

Thanks

 

M