We have a use case where we have to dump data to a text file with previous one hour's worth of data every 5 minutes (rolling). The integrator is currently limited in that it cannot overlap data in a new text file. That is not currently possible. It can easily be setup in task scheduler if OSIsoft provides access to the integrator framework (command line).
In short, instead of a diff, we need the relative timestamps ('*-1h', '*').