from discretize.BaseMesh import BaseMesh
from discretize.TensorMesh import TensorMesh
from discretize.CylMesh import CylMesh
from discretize.CurvilinearMesh import CurvilinearMesh
from discretize.TreeMesh import TreeMesh
from discretize import Tests

__version__   = '0.1.5'
__author__    = 'SimPEG Team'
__license__   = 'MIT'
__copyright__ = '2013 - 2017, SimPEG Developers, http://simpeg.xyz'

@@ -192,62 +192,258 @@
 tize
-.TreeMesh import TreeMesh%0Afrom discretize import Tests
+ import Tests%0A%0Atry:%0A    from discretize.TreeMesh import TreeMesh%0Aexcept ImportError:%0A    print(%0A        %22%22%22%0A        TreeMesh not imported. You need to run:%0A%0A        python setup.py install%0A%0A        to build the TreeMesh cython code.%0A        %22%22%22%0A    )
 %0A%0A__

add a try except for importing the TreeMesh. This should resolve #26