I have problem generating proximity remote with Xhorse VVDI Key Tool. I put remote with battery inside antenna and when I push generate it says internal error.
Problem was SOLVED.
I had upgraded firmware from 3.3.2 to 3 3.4 and proximity remotes works perfect.
Alright, although Xhorse VVDI Key Tool discontinue producing and replaced by VVDI MINI Key Tool, if you have any questions, you will be served.