Process has died error

[arcado-vol2]

I'm trying to launch ov_msckf using subscribe.launch.py with a monocular setup:

• Camera data is grabbed via the ROS usb_cam node.
• IMU data comes from mavros (topic /mavros/imu/data_raw).

I based my config on rpng_plane, adjusting the topics, camera, and IMU parameters. Both the IMU and camera image topics provide valid data.

When launching with --debug or verbose:=DEBUG, there are no detailed logs—just the following sequence:

1. System creation,
2. Error (no specifics),
3. Process termination.

[arcado-vol2]

Find out if change value directly in .py file nodes launches normally, but it is either bag or something else, because other values (like distortion matrix and etc.) setup properly from config file.