I got some values for the diameter organize in a list and the pipes I want to change. When I run the script, inside revit, all the diameters get to 25 mm, even though I have values like 20 and 40
Your list structure doesn’t match. Try flattening your list of elements.
SOLVED IT! GENIUS! (btw, what is happening then in background?)
Your list of values is just a one-dimensional list (a list of single items), but your element list is two-dimensional (a list of lists). Dynamo is trying to line up your lists when it executes a function.
Basically it sees that index 0 in your list of values is 25 and index 0 in your list of elements is a list of pipes. So it sets the value for all elements in that list. It’s assuming that the next value in your list of diameters will also have a list of pipes in the element list.
oh, ok. thanks dude 