Hi Chris,
Actually your suggestion is pretty relevant, since indeed on the move of the Management to R82 I needed to save the table.def of one of the Domains, which is the one giving me problems when I run the vsx_util.
Out of curiosity, i've checked the original R82 table.def versus that on that I've manully saved before the upgrade. And this is the funny part, I'm seeing this:

This is the exact string error that I have when I runthe vsx_util upgrade.
I removed the backup file table.def and put it back the original one. Then, I've run again the vsx_util upgrade to R82 and voilá, it concluded perfectly.
My main concern now is if this is an issue before proceed with the upgrade or not.
Any thoughs on why this is happening?
I'm still waiting for TAC analysis on this.
Kind regards.