Could not burn disc. Result Code = -50

Hi, I am using Toast 10.0.4 and trying to make an AVCHD Archive disc, but every time I click the burn button I get this message:

*Could not record the disc because of a Mac OS Error*
*Result Code = -50*

I have contacted Roxio support and they inform me this is some kind of Mac OS error and not related to their software. They told me to ask the question in here as it would benefit me more.

I can burn everything else on Toast like movies, music and other data but just not AVCHD Archive discs which is the prime reason I bought Toast in the first place.

So any tech wizards out there have any idea why I get that message??

Any help would be appreciated, thanks 🙂