Requesting criticisms of Parmenides' "Denial of the Voi

I’m sure many of you are aware of Parmenides’ denial of ‘nothingness’ in his famous poem ‘On Nature’. I’ve been working a similar theory into my philosophy, which I actually came to before I read Parmenides, and I was wondering if you guys could point out to my any problems that you can see with it, so that I can adapt or dump my own version if necessary.
Many thanks. :wink: