I got a bit stuck while trying to extend INDI and FAM references to link both forwards and backwards. It took a couple of days to determine what the correct implementation should be. Then I made an attempt to code what I thought would work, but it didn’t. I made three attempts to change the technique slightly, but I couldn’t resolve exactly why I couldn’t make it work.
So I went back to my very simple test file: Fred and Wilma Flintstone, Barney and Betty Rubble, and their kids who married: Pebbles and Bamm-Bamm. I’m now debugging with this file to see what’s going on. Hopefully this won’t take too long.