@EricLNZ I got the same error message. vegmuxtw.dll is there in that folder.

Though I haven't made a Blu-ray in years, I tried and failed with Vegas Pro 21-315. I searched for file Vegmuxtw.dll using Agent Ransack and found it under Vegas 13 and 21 on my boot disk. I also ran as an Administrator on the second attempt. I guess I've forgotten the secret handshake.

I was successful with Magix-branded Vegas 13. I don't have any other versions installed at the moment.

I loaded a system image containing Vegas Pro 21-314 and failed to produce a Blu-ray ISO with the same error.

Vegas Pro 21-208 was successful.

We are aware of a BluRay issue in the latest builds of VPro 21. Unfortunately it is a substantial issue which is not easily fixed and at this point, with the rapid decline in disc burning (especially BluRay) and the royalty expenses that we incur for including BluRay support, we are evaluating the cost-benefit of continuing to include and fix this. The trend is indicating that this feature probably is going to go away soon in VPro.

I recently upgraded from Vegas Pro 17 to Vegas Pro 21 because the features you advertised convinced me. Now I have the same problem as john_dennis and get the following error message:
Status:mux.net.dll::CCLIPReader::ReadData::Catch Exception---The file or assembly “Vegmuxtw.dll” or a dependency of it was not found. Is not a valid Win 32 application. (Exception from HRESULT: 0x800700C1)
Now I have to read that you no longer want to support the possibility of burning a BlueRay ... I wonder why I invested over 200 euros in an upgrade? I actually expect to receive support from you as to how this problem can be solved.

Translated with DeepL.com (free version)

It would be a great disappointement. For many, many years I make a BR about the holidays, family and so on. I also write a booklet and put them both in a case. My memories are always visible in my neighbourhood. Would it be an option, like Pinnacle, to offer the BR-functionality, separately?

At the moment I use Vegas Pro Suite 18. When I upgrade to Vegas Pro 22 will the working BR-functionality of Vegas Pro 18 stay unaffected, so that I can still use this (via a bypass)?

Yes, Vegas Pro 18 will work beside Vegas Pro 22. But you are not able to open projects, saved with VP22, in VP18.

Hi Wolfgang,

I am aware of that.

But in my workflow for many years when editing my holiday movies is to render an file (with Voukoder) for each day of that holiday (it's the workflow from earlier Pinnacle Studio days: die 'Bausteinmethode') . That can in future be done in the new Vegas Pro 22 version as I also would render a 4K file for the whole movie in version 22.

In Vegas Pro 18 I will import the rendered 'dayfiles' from Vegas Pro 22 and then 'render as' Bluray disc. That's my intension when the BR-functionality would no longer exist in newer Vegas Pro versions.

So I would in future use Vegas 18 Pro only to produce BR-discs!

Greetings,

Wiel