Hi Aaron,
Couple of questions.  Which COLLADA version is your dae file?  Can you post
your urdf file and the dae file?  Also, as a sanity check, try below and
make sure the file exists:

ls `rospack find urdf_tutorial`/mymodel.dae

hope this helps.
John


On Fri, Feb 4, 2011 at 3:44 AM, Aaron Martinez Romero <
aaronmartinezromero@gmail.com> wrote:

> Hi everyone,
>
> Somebody know how can I load in my urdf a model from google sketup?? I am
> exporting the model in dae file, but I always obtain this error message:
>
> [ERROR] [1296819682.438922687]: Could not load resource
> [package://urdf_tutorial/mymodel.dae]: Collada:
> package://urdf_tutorial/mymodel.dae - Expected opening element
> [ERROR] [1296819682.439516423]: Could not load model
> 'package://urdf_tutorial/mymodel.dae' for link 'right_leg': OGRE
> EXCEPTION(6:FileNotFoundException): Cannot locate resource
> package://urdf_tutorial/mymodel.dae in resource group Autodetect or any
> other group. in ResourceGroupManager::openResource at
> /tmp/buildd/ros-cturtle-visualization-common-1.2.0/debian/ros-cturtle-visualization-common/opt/ros/cturtle/stacks/visualization_common/ogre/build/ogre_src_v1-7-1/OgreMain/src/OgreResourceGroupManager.cpp
> (line 753)
>
>
> If I use other model, like "<mesh
> filename="package://pr2_description/meshes/gripper_v0/l_finger.dae"/>"
> works.
>
> Best regards.
> --
> Atentamente,
> Aarón Martínez Romero
> Ingeniero en Informática
> Tlf: 600 283 349
> http://www.AaronMR.com
>
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