I'm currently deep in programming my HP35s using the D'Zign Survey Solutions PDF. I started by entering the initial subroutines (LBL A, B, and D I believe) but then began jumping around and entering programs out of order. My focus has been on loading the triangle solutions and a few other programs related to what I’m studying right now. The triangle solution program seems to be working fine, but I'm encountering some errors with a few other programs I entered.
My questions are: does the order in which I enter the programs matter? Can I skip around as needed, or should I follow the order in the D'Zign PDF? Also, does the display order (when I press Left Shift, Down, 2) affect functionality?
The order you enter your programs doesn’t matter. A program calling another program doesn’t care about that. I haven’t done any HP 35s programming in many years. Your best bet is to contact Eddie Shore at the Museum of HP Calculators forums.