You create a Recap photo project based on 70 photos.
After manually setting quite a number of registration points (quite time consuming with large number of photos!) and coordinates the upload and processing starts.
If the upload fails for some reason all registration work is lost.
The idea is to save the registration information before the upload starts. This way it can be re-used if the upload fails and the project needs to be re-submitted. If it is a text file, maybe even coordinates can be edited in case there is an error or typo or registratiuon points can be renumbered.
Cheers,
Karsten.