In order to properly import config files while supporting relative paths, it is necessary to internally expand the paths (as well as the symlinks) to check for multiple inclusions, to properly look for a file located relative to another one (instead of related to the execution directory). The IOUtils::cleanPath function has been expanded to support this kind of processing (with a flag to turn it on of off) and a few functions added (getPath, getFilename). The code for Windows has been written but not tested yet. The Posix implementation should also be tested on osx.