Error running simulation: DEPENDENT DEGREE OF FREEDOM MAY ONLY BE SPECIFIED ONCE

[Anonymous]

When running a static force simulation I get the error as shown in the title. It states that a dependent degree of freedom was specified more than once. I have no idea what that is about. Maybe I did some errors in my setup.

This is my model:

https://a360.co/2vfc8Dk

It's a bunch of components linked together with rotational joints, and I fixed the bottom for the simulation.

It's supposed to stand on the floor.

[henderh · Accepted solution]

Hi @Anonymous,

I suspect the reason for the error is that the anchor point is defined with a vertex, but the dependent entity(ies) have a face selected that includes the same vertex as the anchor point.  You can redefine the anchor point to a different vertex and the solve will complete without error.

You mentioned using joints, but Simulation is unaware of the joints defined in the Design / Model workspace to define the degrees of freedom of the mechanism.  Instead, you'll need to define contacts in the Simulation workspace to define the mechanism's DOFs.

Edit: I've logged an issue to detect the condition in pre-check as ID 49543.  Thank you for bringing this to our attention.

Hope this helps!

Best regards,

[Anonymous]

Thanks.

I don't really know how to make my model behave correctly for the simulation, but that's off topic here 🙂