## Problem on using URDF

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ahmedelwaly
Posts: 2
Joined: 06 Apr 2021, 21:31

### Problem on using URDF

I am trying to import my robot model using URDF plugin, but when i import, it says

Code: Select all

simExtURDF: info: import operation started.
simExtURDF: info: there are 12 joints.
simExtURDF: error: there is no joint with name ''
simExtURDF: error: there is no joint with name ''
simExtURDF: error: there is no joint with name ''
simExtURDF: error: there is no joint with name ''
simExtURDF: info: there are 13 links.
I don't understand the error "ERROR: there is no joint with name ''" .

Do you have any suggestions as to how to import the model correctly?

coppelia
Posts: 8513
Joined: 14 Dec 2012, 00:25

### Re: Problem on using URDF

Hello,

the error means that the joint does not have any name, in the URDF file. This does not always mean that the file is faulty. But what a simulator expects from a file and what is actually in the file can greatly vary.

Does the import operation produce anything? Or what is the problem, next to the error messages?

Cheers

fai
Posts: 4
Joined: 23 Sep 2015, 21:04

### Re: Problem on using URDF

Hi,
I have the same error message, but the imported model seems right.
My urdf file looks like:

<joint name="Rigid13" type="fixed">
<origin rpy="0 0 0" xyz="0.054297 -0.07 0.1"/>
</joint>

<joint name="Rev14" type="continuous">
<origin rpy="0 0 0" xyz="0.217851 0.050972 0.1"/>
<axis xyz="1.0 0.0 0.0"/>

So, it looks like the name for the joints are well defined. In fact, the imported joints in CoppeliaSim appear with these names. So, is this just a bug in the plugging or should the joints be defined in some other way?
Cheers,
Andres

coppelia