On Mon, Sep 20, 2010 at 10:49 AM, Eitan Marder-Eppstein wrote: > 4) For large maps, on some machines, I can see it taking some time for AMCL > to start up. Do the errors your experiencing go away consistently after AMCL > is successfully up and running? On that particular point, older versions of amcl had a very inefficient procedure for pre-computing the likelihood field model for the laser. It could take tens of seconds to run on large maps. What version of navigation are you using? brian.