Has anyone been able to run r.traj? when I try I get a Segmentation fault. my input is r.traj input=DEM.final output=traj.out weapon=M1 coordinate=580367,4342205 elevation=2.5 ammunition=M392 left.azimuth=N10E right.azimuth=N15E any help would be appreciated. Bob Atnip (812)526-1249 atnip at osiris.cso.uiuc.edu