Cannot figure out why you have in some examples array with indexes build_ele_list[0,2] - which elements from the pallets you read where?
Somewhere you have just build-ele as normal variable? What to read with index 0 and what with index 2?

When you have just simple variables is logical, through this variable you can get values from the pallete.
But when you have an array it is not logical, where you need to use 0 and when 2 for accessing the values from array. What these indexes at all means?

Thanks for any reply on this topic as it is not explained anywhere in documentation.
Primoz