Hello Laszlo, thank you for the reply.
I've added that expression into the expression editor after I created a new property. It tried matching your settings exactly based upon your screenshot ( I am in A22, so I changed the number to 22 instead of 23). For some reason it is not changing the 'Library Part Name" parameter in the window schedule. Is there another step I'm missing? I've tried it with all of the "Classifications" ("All, None, Custom") in the lower right under Property Manager dialogue box. Also, tried going through most of Archicad's videos on this topic and they're all very high level and pretty basic. Any help or references would be much appreciated.
ArchiCAD 24, 25 & 26 US
WINDOWS PC, 16GB RAM, Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz 3.40 GHZ, NVIDIA GEForce GTX 970, ASUS, CM6870, Rev X.0x