My infopath list is where engineers enter specs and measurements they take at sites twice a year. In subsequent visits to a site the first 25 fields (the specs) are apt to be exactly the same. They've asked about getting those 25 fields populated from the record of the previous visit. If I can get a direction of attack without going down too much of a rabbit hole I might try it.
So far I've tried creating a secondary data source to the SAME list, and getting values from a previous record, filtering by the site-date combination which is my title field. I've tried doing this to populate field-default value, control-default value and in 'set a field's value' in form load rules. I go to 'formula' - show fields' advanced view - choose the secondary source - choose the field and filter by title = "Site1 2020-02-07" for instance.
So far I have not gotten ANY values to show up. That is a very strong deterrent to any further experimentation.
Is creating a secondary data source to the same list impossible?
Is it more apt to work if I create a second list, with sites and their specs, as the external data source?
Is there a simpler path I should be trying?
Thanks