On Mon, Nov 10, 2014 at 7:44 PM, <yt-users-request@lists.spacepope.org<mailto:yt-users-request@lists.spacepope.org>> wrote: for state in sorted(sol.states, key = lambda a: a.patch.level): That did indeed fix it; thanks! It looks like we (Clawpack) may adopt yt as our preferred package for 3d plotting. If so, we may write a frontend at some point. Thanks to all of you for creating yt. ________________________________ This message and its contents including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.