Code modifications that cause non-local changes to the hydro require communication across grids, to parents, and to children grids. This can be a challenge to track down. Try our new ExtraOutputs, which puts a full call to WriteAllData at a number of points in EvolveLevel. More explanation in the docs.
This is an Enzo2.3 mod.
This is already in Enzo3.0 and is very useful. I think this should be included.
Dave, you make a good point. We should return to this after the merger. I've stuck it in #12 .