Hi all. New to the forums. From a quick scan across the posts it seems this question remains unanswered and I too have the same issue. I get the error code 3, "Fail to write M2S file." Now, I got this error the second I started to write to disc. However after Live Chat with Adobe (for the 4th time on this issue) we tried simply using dynamic link instead of media encoder (even though I was previously advised NOT to use dynamic link from another Adobe staff on a previous project's problems) and that solved the issue. The disc burned. Great.
Now this was last night. Today I loaded the project again, added in menus which weren't in the test disc, re-burned and again, the error message came up, only this time it didn't happen instantly, it came up at around 7Gb into the burn out of 8.31Gb. So I am confused. Currently as I type I am again in Live Chat with an Adobe staff member and we are trying to burn to folder as "there is a known issue when burning to Blu-ray". I will update when I get a result. I have to say I am far from impressed at the level and variety of bugs in this so-called professional and expensive software. I am starting a video business and if I continue getting bugs over the coming weeks then I will seriously consider looking at a refund and buying something else. But I want to give these guys a proper chance to sort this.