I was fiddling around with the Studio One full demo (which I don't much like) for a while, and then shut it down and decided to fire up Sonar again and get back to more familiar terrain. Except, Sonar won't launch if Studio Ones has been running. I have to reboot my computer before Sonar will launch. Same with Samplitude - it will hang on the launch screen if Studio One has been running, and requires a reboot before it will fire up. 
 
Anyone experience this?
 
 

Checking.... (Sonar is very finicky for me and regularly crashes on startup if some little thing isn't exactly right.)
 
 
Edit: Sho Nuff! Crashola, bygola!
 
Restarting...

I don't experience this, and I've been running Sonar and Studio One for a year or so. Could be that they are competing for the exclusive audio driver and something isn't shutting it down properly. Perhaps set one or both programs to something other than ASIO mode?

I have both Sonar and Studio One 3 running without issue as well.

no issues here

Crashed for me as well.  Ok after restart, BUT...?!

Kylotan
I don't experience this, and I've been running Sonar and Studio One for a year or so. Could be that they are competing for the exclusive audio driver and something isn't shutting it down properly. Perhaps set one or both programs to something other than ASIO mode?

I’ll give that a try tonight. That’s a fair guess as to the potential issue...

No issue for me either.