Xpresso python tag issue

[arjo]

This script in the xpresso python tag works fine in Cinema 4D R19 but it doesn't work in higher versions. When I click on compile it says "no errors". The script should write spline data that I use in a range mapper node. But when I connect the output ports to the range mapper spline input port both the python and the range mapper turn yellow. Does anybody have an idea why this works in older versions of Cinema 4D but not in 2025?

import c4d
import math

def main():
    global steps #number of steps
    global stepsize #size of each step
    global skidstep #spline data for range mapper
    global returnstep #spline data for range mapper

    points = steps * 2
    Xstep = 1 / points
    Ystep = 1 / steps

    points = points + 1
    skidstep = c4d.SplineData()
    skidstep.MakePointBuffer(points)
    returnstep = c4d.SplineData()
    returnstep.MakePointBuffer(points)

    X = 0
    Ya = 0
    Yb = 1
    step = 0

    while step < points:
        vec_A = c4d.Vector(X, Ya, 0)
        vec_B = c4d.Vector(X, Yb, 0)
        skidstep.SetKnot(step, vec_A)
        returnstep.SetKnot(step, vec_B)
        X = X + Xstep
        step = step + 1
        if step % 2 != 0:
            Ya = Ya + Ystep
            Yb = 0
        else:
            Yb = 1

[ferdinand]

Hello @arjo,

Thank you for reaching out to us. Without your scene file there is not much what we can do for you. That code, at a glance, is correct.

Cheers,
Ferdinand

[arjo]

@ferdinand skidding.c4d

[ferdinand]

Hey @arjo,

There are errors in your console, and they tell you exactly what the issue is. Your steps variable is not an integer and MakePointBuffer expects an integer for its number of points.

Cheers,
Ferdinand

Before

and after, I just cast points to int:

[arjo]

Ah, super! thank you.