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yea im trying to use hector mapping, but im having problems with the bag file. I can get the map data with the sample bag files put up but cant get anything from the bagfiles i create. im subscribing to /scan /tf and /asctec/imucalcdata , the tf frames are just basic ones that just describe the location of the lidar with respect to the center of gravity of the quadrotor. can u please tell me if im missing anything im using the hokuyo urg 04lx