A little late, but if anyone else has this problem.
Try running make install.
For some reason babel needs to be installed to work even though the CMake
tests will pass.
Without running make install no formats will be available as well, therefore
you shouldn't be able to convert file formats.
Dear OBabel user: I have been struggling to activate the Confab module of
obabel for several day without any luck. I compiled Open Babel 2.3.2,
installed all the required libraries (including EIGEN) as mentioned in the
provided INSTALL file, and carefully followed all the instructions. After
compil