O problem in use `nupic.rootDir` is that nupic files try find configuration files from where they are installed.. Config files should be usually in HOME or REPOSITORY user.. Because this, it was replaced all references of `nupic.rootDir` to `os.environment['NUPIC']`.. Along the time, we also could remove `os.environment['NUPIC']` to `os.environment['HOME']` or other, in order to we remove $NUPIC once all...