question about parsing urdf file

edit

I followed this answer but the same question still appeared.

 xu@xu-ThinkPad-SL410:~$ cd   ~/catkin_ws/src/Learning_tutorials/urdf
        xu@xu-ThinkPad-SL410:~/catkin_ws/src/Learning_tutorials/urdf$ check_urdf my_robot.urdf
Error:   Error document empty.
         at line 72 in /build/buildd/urdfdom-0.2.10+dfsg/urdf_parser/src/model.cpp
ERROR: Model Parsing the xml failed

Can you try with full path to URDF?

Do you mean running check_urdf /home/xu/catkin_ws/src/Learning_tutorials/urdf/my_robot.urdf directly to parse my file? I have tried that way ,but still failed.

Are you sure that your path is OK? Can you check your file location respecting lower/upper case letters?

I'm sure that my path is correct. But when I run another urfd file"01-myfirst.urdf", which is in the same package with "my_robot.urdf", it succeeded.

xu@xu-ThinkPad-SL410:~/catkin_ws/src/urdf_tutorial/urdf$ check_urdf 01-myfirst.urdf robot name is: myfirst Successfully Parsed XML