I sure hope this get sorted out..... I have a lot of 8.5 CWP files I need to open and update to AD etc. All of them have TTS-1. At least I still have X3e and Professional from last summer installed if all else fails. 

Cactus Music
I sure hope this get sorted out..... I have a lot of 8.5 CWP files I need to open and update to AD etc. All of them have TTS-1. At least I still have X3e and Professional from last summer installed if all else fails. 

The weird thing is that TTS-1 crashes only some projects so it can't be simply a TTS-1 issue.
I have a project started in Sonar 7 that made its way thru all the upgrades to Platinum. It uses all 32 channels of 2 TTS-1 instances. It works fine. Maybe you will luck out with your older projects.
I have another project that uses one channel of one TTS-1. It worked for sure in Plat 2016-7 or 2016-6. It crashes 2016-8.1 EVERY TIME. If I replace the TTS-1 instance, it crashes.
If I start a new project in 2016-8.1 with only the TTS-1, it works.
So the problem is more complex than just TTS-1.

vechung
Ok, I created the problem report and it is
 
CWBRN-545909/30/2016
Sonar Platinum crashes when loading a Sonar 8.5 project.

Hello the crash is actually in VVocal. Can you also attach a minimal version of the project including the audio data?
in 8.5 delete all but the vvocal track and save again. Then try and reopen the project in Platinum.
You can then zip the files and attach it to the report.

May be irrelevant, but one commonality between V-Vocal and TTS-1 is that they are both DX.

I always found VVocal buggy so I don't use it so I guess I'll be fine.. But TTS-1 is my Kick drum as well as organ on most of my backing tracks.
As I move ahead I'm now using more AD kick drums, but I need to find a good stand along classic B3.