# Lidar\_node process has died **URL:** \ **Category:** Ask\ **Created:** [June 26, 2023, 11:57am UTC](https://forum.hello-robot.com/t/lidar-node-process-has-died/760 "2023-06-26T11:57:51Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![bshah](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.hello-robot.com/bshah/32/55_2.png) [@bshah](https://forum.hello-robot.com/u/bshah)\ **Post date:** [June 27, 2023, 9:08pm UTC](https://forum.hello-robot.com/t/lidar-node-process-has-died/760/2 "2023-06-27T21:08:50Z")
Hi @roboor, based on the `[lidar_node-7] process has died` error, it looks like the lidar isn’t streaming data in ROS. Would you run the following four commands to verify that the lidar is able to stream data via the Python API? ```auto $ stretch_rp_lidar_jog.py --reset For use with S T R E T C H (R) RESEARCH EDITION from Hello Robot Inc. --------------------------------------------------------------------- [INFO] [rplidar]: Reseting the sensor None [INFO] [rplidar]: Stoping motor $ stretch_rp_lidar_jog.py --motor_on For use with S T R E T C H (R) RESEARCH EDITION from Hello Robot Inc. --------------------------------------------------------------------- [INFO] [rplidar]: Starting motor $ stretch_rp_lidar_jog.py --health For use with S T R E T C H (R) RESEARCH EDITION from Hello Robot Inc. --------------------------------------------------------------------- [INFO] [rplidar]: Asking for health ('Good', 0) [INFO] [rplidar]: Stoping motor $ stretch_rp_lidar_jog.py --range For use with S T R E T C H (R) RESEARCH EDITION from Hello Robot Inc. --------------------------------------------------------------------- [INFO] [rplidar]: Starting motor [INFO] [rplidar]: Asking for health [INFO] [rplidar]: starting scan process in normal mode 0: Got 76 measurments Scan [(11, 157.671875, 1114.5), (15, 162.125, 1103.25), (15, 170.171875, 231.5), (15, 167.53125, 1511.25), (15, 168.953125, 1514.0), (15, 184.984375, 1553.75), (15, 186.453125, 1574.0), (15, 187.875, 1584.5), (15, 193.015625, 847.0), (15, 202.515625, 621.5), (15, 209.8125, 607.0), (15, 211.328125, 619.75), (15, 212.6875, 634.75), (15, 215.515625, 667.25), (15, 216.953125, 662.25), (15, 218.46875, 646.25), (15, 219.9375, 631.0), (15, 221.484375, 617.25), (15, 223.015625, 604.25), (15, 224.46875, 591.75), (15, 234.359375, 147.5), (15, 234.78125, 145.0), (15, 236.234375, 142.5), (15, 237.6875, 140.0), (15, 239.15625, 138.0), (15, 255.859375, 472.75), (15, 257.4375, 470.75), (15, 259.015625, 470.0), (15, 260.359375, 469.25), (15, 261.875, 469.0), (15, 263.296875, 469.25), (15, 264.765625, 469.5), (15, 266.109375, 470.0), (15, 267.6875, 470.75), (15, 269.25, 472.25), (15, 270.453125, 473.75), (15, 271.9375, 475.5), (15, 273.359375, 478.0), (15, 275.0, 480.5), (15, 276.515625, 483.25), (15, 277.765625, 486.75), (15, 279.3125, 490.5), (15, 280.59375, 494.25), (15, 282.203125, 499.0), (15, 283.34375, 503.5), (15, 285.0, 508.25), (15, 286.28125, 513.75), (15, 287.859375, 519.5), (15, 289.21875, 526.25), (15, 290.765625, 532.75), (15, 291.921875, 540.0), (15, 293.515625, 548.25), (15, 295.0, 556.25), (15, 296.25, 566.0), (15, 297.71875, 576.0), (15, 299.140625, 586.0), (15, 300.484375, 597.0), (15, 302.046875, 609.5), (15, 303.328125, 622.25), (15, 304.875, 622.0), (15, 306.359375, 623.25), (15, 307.765625, 630.75), (15, 310.984375, 575.5), (15, 313.921875, 547.25), (15, 315.609375, 539.25), (15, 316.890625, 543.0), (15, 319.484375, 575.75), (15, 322.734375, 526.0), (15, 324.1875, 525.25), (15, 328.140625, 669.0), (15, 329.453125, 683.75), (15, 336.3125, 882.5), (15, 344.671875, 1223.75), (15, 346.125, 1219.0), (15, 347.53125, 1217.75), (15, 348.984375, 1218.0)] [INFO] [rplidar]: Stoping motor ``` If you don’t see any measurements, let’s collect a dmesg log using `REx_dmesg_monitor.py`. Run this CLI is a separate terminal before running the experiment. When the Lidar fails, return to this terminal to save the log. --- _[View the full topic](https://forum.hello-robot.com/t/lidar-node-process-has-died/760)._