I'll try that Craig, thanks.
 
Interestingly, this is happening on both computers that I use, which are totally different in terms of hardware & configuration, so I don't think it's system related

Two separate machines throws a wrench into the mix. Have you tried downloading a new SONAR update (i.e. deleting/moving the previous one) and simply reinstalling it? I know the CCC validates files now, but stranger things have happened.
 
Another thing that comes to mind is checking for a DirectX update (Start->dxdiag.exe will show you what version is running on your machine). I have version 11 loaded on this machine.

Hi Mike. Both systems were updated only last week, but I'll definitely check which DX version is running when i get home.
 
Thanks,

can you open the projects/play in a pre-splat sonar?

Tried all the above, same story/
 
It works as expected in all pre-splat versions in blank projects but not in a loaded one.

This is interesting.
 
I saved a template with just TTS-1 in it as a template.
Then in Splat I copy/dragged the template into an existing project.
 
Opening the gui reveals not the TTS-1 but Rapture..........
 

Sounds like something has gotten totally corupted there for sure?? 
I have probably used tts-1 in every project I have ever mucked with since 2004. I use the Kick drum on 90% of my stuff and I still like some of the organs better than Dim Pro. 
If anything always work for me it is good ol' TTs-1. 
And I can insert it at any point in any project at any settings. 
But then I'm still on Profesional. Still haven't been able to download my shiny new Platinum I paid for. 

Tonight I'm going to do it the other way round - import an existing project into my TTS1 template, see what happens and report back.
 
But this is a bloody nuisance. I can't think what on earth could be causing these problems

rest/rescan? do you have a dx version of rapture installed?

Already reset & rescan.
 
Yep, this is the dx