On Feb 17, 2017, at 12:39 PM, Yingchao Lu <yingchao.lu@rice.edu> wrote:Inhttp://yt-project.org/doc/examining/loading_data.html import yt units_override = {"length_unit":(1.0,"Mpc"), "time_unit"(1.0,"Myr"), "mass_unit":(1.0e14,"Msun")} ds = yt.load("id0/cluster_merger.0250.vtk", units_override=units_override) It seems a : is missing after time_unit Yingchao_______________________________________________yt-users mailing listyt-users@lists.spacepope.orghttp://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org