The selected object as well as the other big object are both obstacles. There is a rectangle at the top as the inflow and another at the bottom as the outflow. The whole thing is surrounded with a cube that is the domain (it is hidden now). Basically, it is a slab then a drop then a slab. A side view looks like this:
000000000 x 0 ooooooo 0 o 0 o 00000000 o y oooooooooo
o - Object 1, obstacle
0 - Object 2, obstacle
x - Object 3, inflow
y - Object 4, outflow
And a cube as the domain surrounding all of that. I have the default settings on all except for no slip and some velocity on the inflow and water on the domain for viscosity. When I bake the domain just stays a cube. What would cause this?