# CartesianCommand.TrackingError - Source proto: `rb/api/basic_command.proto` | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | position_error | [double](../scalar-value-types.md#scalar-value-types) | | | | orientation_error | [double](../scalar-value-types.md#scalar-value-types) | | |