Robots in Architecture Forum

KUKA|prc - parametric robot control for Grasshopper => Support => Topic started by: OXIDO on January 21, 2026, 10:01:27 AM

Title: SPLINE is too long> error in kuka
Post by: OXIDO on January 21, 2026, 10:01:27 AM
Hello,
I have a spline with over 3000 points, and the KUKA shows me an error "SPLINE is too long". I think this is more of a RAM problem. Has anyone faced a similar problem or have a solution for this?

I have already tested to break the spline into 1500 points each; the program works, but there is also a small pause between the two splines.

Best,
Ojas
Title: Re: SPLINE is too long> error in kuka
Post by: Johannes @ Robots in Architecture on January 21, 2026, 11:10:54 AM
Basically you should be able to blend two splines, however with 1500 points each the brief pause may be the robot looking at all the points to calculate the trajectory. Do you have the same pause blending two splines with 10 positions?

As always the disclaimer to be careful around splines as they are efficient, "beautiful" paths, but they are not B-splines and the Grasshopper preview may not be accurate. They may also differ between two robots as they take the robot kinematics into account, as far as I know.

Best,
Johannes
Title: Re: SPLINE is too long> error in kuka
Post by: OXIDO on January 21, 2026, 02:00:14 PM
Is there a way for KUKA to read a spline with 5,000 points? I want to avoid cutting them.
Can I get a new RAM, for example?
Title: Re: SPLINE is too long> error in kuka
Post by: Johannes @ Robots in Architecture on January 21, 2026, 03:38:32 PM
The normal point limit is quite a bit higher than that, so I'm not sure if RAM is really the issue.
My guess is computational effort to plan a spline consisting of so many points. But that is just a guess.

Best,
Johannes