Celebration. It works. The things that I have changed was a complete new build of Centos 7, FOG (Version: 7306), and followed new documentation. This allowed me to register a machine and perform inventory but I could not start an upload (could not load images directory (/bin/fog. Upload).
Did some check regarding services and found NFS was not running. Once the latter was started, the ability to perform the partclone was successful.
I am very happy, thank you all