新手处理kitti数据集，跟着教程（使用LeGO-LOAM运行KITTI数据集_kitti lego loam_Ocean_Controller的博客-CSDN博客）

进行到将数据集bin格式输出bag格式的时候，修改完路径执行 

roslaunch kittibag kittibag.launch    命令，

之后报错

setting /run_id to 8136a9cc-c405-11ed-a9aa-652aa3d97226
process[rosout-1]: started with pid [2843]
started core service [/rosout]
process[kittibag-2]: started with pid [2850]
Reading sequence 00 from /catkin_ws/data/
terminate called after throwing an instance of 'rosbag::BagIOException'
  what():  Error opening file: /catkin_ws/data/kitti00.bag
[kittibag-2] process has died [pid 2850, exit code -6, cmd /home/jgl/catkin_ws/devel/lib/kittibag/kittibag __name:=kittibag __log:=/home/jgl/.ros/log/8136a9cc-c405-11ed-a9aa-652aa3d97226/kittibag-2.log].
log file: /home/jgl/.ros/log/8136a9cc-c405-11ed-a9aa-652aa3d97226/kittibag-2*.log

其中 what():  Error opening file: /catkin_ws/data/kitti00.bag  ，  /catkin_ws/data/kitti00.bag应该是我的输出地址和保存格式，为什么报打开错误

请问有大佬知道怎么回事吗？