Hi Kim,
Sadly, ParksnPeaks SMS spotting is only for POTA and WWFF(AU). That is the reason for the database errors. I did contact ParksnPeaks but they are focused on the AU/NZ needs.
I do use WWFF Agenda when possible but this doesn’t always work. SMS seems like a good alternative when cell service is poor. The latest generation of smart phones can even SMS directly to a satellite constellation if terrestrial service is not available. In the US, T-Mobile offers satellite service (StarLink) for $US10/month. Of course this is of no use if there isn’t a gateway.
73,
Art WK2S