ros2 runtime_error ai_generated true

Failed to parse parameters YAML file: Invalid YAML

ID: ros2/param-yaml-load-error

Also available as: JSON · Markdown

90%Fix Rate

90%Confidence

3Evidence

2023-01-01First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
2	active	—	—	—

ROS 2 parameter YAML file has syntax errors or wrong structure. Parameters must be under /**/ros__parameters.

generic

95% success Follow the correct ROS 2 parameter YAML structure

/my_node:\n  ros__parameters:\n    param1: value1\n    param2: value2

88% success Use /** wildcard to apply parameters to any node name
```
/**:\n  ros__parameters:\n    use_sim_time: true
```
85% success Validate YAML syntax with python -c 'import yaml; yaml.safe_load(open(f))'
```
python3 -c "import yaml; yaml.safe_load(open('params.yaml'))"
```

Common approaches that don't work:

Use flat key=value format without proper YAML nesting 85% fail
ROS 2 requires specific YAML structure: node_name.ros__parameters.param_name
Use ROS 1 style rosparam YAML format 88% fail
ROS 2 parameter YAML has different structure with ros__parameters namespace