Thanks for your reply Wim,
Neither the Ajax or Cumulus have a realtimeTagsT.txt, but I may have missed something. There is only one place to upload he realtime.txt file and that is in Cumulus/Configuration/Internet Settings. There is a place to check to setup realtime and I have done that.
In the settings-weather.php: $SITE['realtimefile'] = './realtime.txt'; // directory and name of Cumulus realtime.txt file, is there supposed to be a directory for this and if so, how is it created?
Bill