Hi, I am trying to figure out how to import one submodule from a hierarchical module in GHCi. For example, at the end of Chapter 6 of LYAHFGG (page 106-107), there's an example of a hierarchical module. Or at the bottom of this page, http://learnyouahaskell.com/modules If I recreate that module on my system and try to import, this is the output: [~/Geometry]$ ls Cube.hs Cuboid.hs Sphere.hs [~/Geometry]$ ghci GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> import Geometry.Sphere <no location info>: Could not find module `Geometry.Sphere' It is not a module in the current program, or in any known package. Prelude> :set -iGeometry Prelude> import Geometry.Sphere <no location info>: Could not find module `Geometry.Sphere' It is not a module in the current program, or in any known package. Prelude> :load Sphere [1 of 1] Compiling Geometry.Sphere ( Sphere.hs, interpreted ) Ok, modules loaded: Geometry.Sphere. *Geometry.Sphere> :load Cube Cube.hs:6:18: Could not find module `Geometry.Cuboid' Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude> :load Cuboid [1 of 1] Compiling Geometry.Cuboid ( Cuboid.hs, interpreted ) Ok, modules loaded: Geometry.Cuboid. *Geometry.Cuboid> :load Cube Cube.hs:6:18: Could not find module `Geometry.Cuboid' Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude> So I can't just "import Geometry.Sphere", and I tried setting -i, but that doesn't seem to help. Instead I have to ":load Sphere". Fine, but then when I try to ":load Cube", it fails because of the line in Cube.hs that imports Geometry.Cuboid. Even if I load Geometry.Cuboid first and then try to load Geometry.Cube, it still fails. So, in GHCi, how do I successfully import a submodule that needs to import some other submodule in the module? Thanks, James