Dropped 100.00% of messages so far. Please turn the [ros.velodyne_pointcloud.message_filter

[laghbani]

I try to run this roslaunch`` ford_demo multi_lidar_convert.launch for viewing the live lidar pointcloud,but It does not appear in rviz，there is a warnning that [ WARN] [1628749506.660728638]: MessageFilter [target=odom ]: Dropped 100.00% of messages so far. Please turn the [ros.velodyne_pointcloud.message_filter] rosconsole logger to DEBUG for more information.
rostopic echo /lidar_red_pointcloud , there is alse no pointcloud data.
How should I solved it?

[laghbani]

solved:
pls change param name="target_frame_id" value="lidar_red"/ to
param name="frame_id" value="lidar_red"/