Thanks to ABG's and Juan_Antonio's input, I'm closer to the correct solution, but still having access issues. I'm testing the access with integers rather than with current index and "length of" variables. If I use a hex input of "7DE" and set the "to" value to 4 in the "for each" block, I get the error message below, which is no surprise as the length of the hexEntry array only 3. The good news is that now the proper hex to decimal conversions are taking place. If I change the "to" value to 3, I get the answer "" returned in the lbl_DecimalNumberOutput label. I also get the same answer if I change "to" to "length of" global hexEntry.
Select list item: Attempt to get item number 4 of a list of length 3: ["7", 13, 14]