Ya, I did that. It may have something to do with the p2os_teleop package that I am using -- could they be interfering? I installed the teleop package after gmapping worked for me last Friday... so that's probably it... any ideas on interference between the two? Thanks Rishi Rishi Bedi rbedi100@gmail.com On Tue, Jul 20, 2010 at 12:30 PM, Brian Gerkey wrote: > hi Rishi, > > I just ran through that tutorial, downloading the linked bag, and it > works fine for me.  Did you set the use_sim_time parameter (step 4) > before starting gmapping (step 5)? > >        brian. > > On Tue, Jul 20, 2010 at 8:08 AM, Rishi Bedi wrote: >> Hi, >> I'm trying to run the gmapping package, following the tutorial here: >> http://www.ros.org/wiki/slam_gmapping/Tutorials/MappingFromLoggedData >> . >> I'm getting errors at a few points along the way, however -- when I >> try to record my own bagfile from my Pioneer 2 (which I am >> teleoperating using a joystick), I repeatedly get this error: >> "[FATAL] [WallTime: 1279638142.894919030]: rosrecord::Record: could >> not write to file.  Check permissions and diskspace" My diskspace is >> definitely enough -- what permissions is it alluding to? >> >> I then tried just using the bagfile linked to in the tutorial, but >> gmapping outputs the following, repeatedly: "[ WARN] [WallTime: >> 1279638187.366396181]: TF_OLD_DATA ignoring data from the past for >> frame /base_link at time 126.2 according to authority >> /play_1279638095646529424". Using rosbag play to play the bagfile >> appears to be working, but it shows this: >> "RUNNING]  Bag Time:     35.500164   Duration: 0.900164 / >> 1239670987.745222   " <-- it's counting by 1/10, so that looks too >> big... it would take a while to count to that! >> >> Thanks, >> Rishi >> >> Rishi Bedi >> rbedi100@gmail.com >> _______________________________________________ >> ros-users mailing list >> ros-users@code.ros.org >> https://code.ros.org/mailman/listinfo/ros-users >> > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users >