Error: wb_lidar_get_range_image() called for a disabled device! Please use: wb_lidar_enable().

[hardik-a62]

Webots version: 2023a

I am writing a custom controller for our robot in the webot simulator. Previously I have written the controller for our robot on 2022b version with Lidar, Camera and other sensors. Now I am migrating these things to a newer version of webots and facing some issues.

The issue is when I am accessing the devices like (lidar and camera) I am following this order of function call:

lidar = robot.getDevice('lidar')
lidar.enable(robot.getBasicTimeStep())
lidar.getLayerRangeImage(0)

The last function throws me this error:
Error: wb_lidar_get_range_image() called for a disabled device! Please use: wb_lidar_enable().

According to error it seems like the devices is not enabled, but I have called a function to enable the device.
Same thing is happning with camera as well.

I have tested the same robot model and controller on older version of webots 2022b, there this steps are working and I am able to get the data out of sensors.

[omichel]

Did you try to call robot.step(robot.getBasicTimeStep()) right after enabling the sensor?

[hardik-a62]

Thank you for your promt reply :)

It worked !!!!