Cumulus Support

Random parserror syntaxerror json parser unexpected end of data at line 1 column 1 of jsondata

This seems to occur after page timeout at times it can run for hours no issues, sometime corrects itself other times it doesn't.

Sadly doens't say which json file and I wonder if it's just hitting the time the json file is updating.

https://www.sheffieldweather.net/live_weather.htm

Your homepage uses https://www.sheffieldweather.net/realtimegauges.txt for the JSON to display the Gauges.
The file https://www.sheffieldweather.net/websitedata.json is loaded once at page load. The realtimegauges.txt file is accessed by jQuery every second or so (you should make that every 4 seconds or so).

It's likely that the failure happens when an incomplete realtimegauges.txt file is accessed just while MX is uploading it to your website.

Yup definitely the update now does it every 20's then corrects itself four seconds later

In your FTP configuration are you using the "rename" option, that effectively eliminates the time the file is incomplete.

That fixed it. Strange it never used to be a problem.