Observation key 'global_camera' not found.

[guomengzhangtoufa]

Hello, I really appreciate your great work! I just ran into an issue when following the tutorial and wonder if you could offer some help.
ValueError: Observation key 'global_camera' not found. Available keys: ['actions', 'joint_pos', 'joint_vel', 'joint_pos_rel', 'joint_vel_rel', 'eef_pos', 'eef_quat']. This might indicate that the camera 'global_camera' is not enabled or not in the observation space.

[yueduduo]

Thanks for reporting this issue! To help us figure out what's going wrong, could you share a bit more context:

• What command did you execute when this error occurred?

• Which environment (e.g., simulation setup, robot model) were you running?

• Which part of the tutorial/documentation were you following (a link or section number would be great)?

[yueduduo]

Thanks for your patience! I've identified the root cause of this issue and here's the solution:

Background

This problem occurs because the global_camera is not enabled by default in the version corresponding to commit 9b7aec82150833b48ef4cab88147e045adca4a65 (we're still in iterative development). The documentation missed a critical runtime parameter for camera activation.

Fix

When running the environment server script, add the --enable_cameras parameter:

python lw_benchhub/scripts/env_server.py --enable_cameras

Note

To reproduce/fix this issue, please first checkout to the specific commit:

git checkout v1.0.1