Hello,
When running example codes abount “tobii_get_track_box” and “tobii_eye_position_normalized_subscribe” on the API documentation page(https://tobiitech.github.io/stream-engine-docs/), error was reported:
Assertion failed: error == TOBII_ERROR_NO_ERROR.
So I added “printf( “%s\n”, tobii_error_message( error ) );” after these codes:
error = tobii_get_track_box( device, &track_box );
error = tobii_eye_position_normalized_subscribe(device, eye_position_callback, 0);
Then I got “Attempt to use a feature which is not supported.” My device is Eye Tracker 5.
Please kindly inform me how could I make these codes work?