Hi,
To store the last execution, you could just have a trigger action item that was at the bottom of the list which was:
StoreVariable("group1_lastrun",now())To get it back and check the difference, you could do the following:
DateDiff(GetVariable("group1_lastrun",ToDate("2000-01-01")),now(),"sec")That will return the number of seconds between the last run, and now, with a default way in the past if it’s the first time the group has run.
Hope this helps,