I'm still in "learning mode" with Sonar...
I ran all of the tutorials and was happily using Sonar Manchester for several days when suddenly it stopped working. Now, it crashes immediately when I begin a playback of an existing project. I tried several different projects, all based on the tutorials, and it crashes on all of them. It plays back about one measure, then "goes white."
I have tried this...
    * restored my (Win8.1) system to the state it was in before the latest "disaster recovery" updates from Microsoft.
            (These had installed themselves just a couple of days ago.)
    * reinstalled the latest Sonar Platinum version, via the Command Center
    * reinstalled the drivers for my Scarlett 18i8
 
The problem remains.
I can't use Sonar at all, now, which of course does not make me very happy.
Anyone have any clues for something I may not have thought of?
Thanks much...
      -Ernie
 

Hi. Maybe try to open project in safe mode (hold Shift while opening project)? Or hold Shift while opening SONAR. This should reconfigure SONAR's preferences. Which version of SONAR do you have? Do you have the latest drivers for your Audio Interface? Hope it helps.
All the best.

I'm using the latest build of Manchester. (reinstalled it thru Command Center, just to make sure.)
I do also have the latest drivers for my Scarlett 18i8. (reinstalled them, just to make sure.)
 
I just now tried changing my Sonar playback device to my system's built-in Realtek speakers, to take the Scarlett 18i8 out of the picture. The project played for a few more measures than when I designated the Scarlett -- but after a few measures, Sonar crashed again (went white, with "Not Responding").
 
Does reinstalling Sonar through the Command Center really do a full reinstall?
 
Interestingly, while I was typing this, Sonar came back to life... so I tried "play" again, and the result was the same. Played a few measures -- I clicked the Stop button and Sonar went back to "Not Responding".
This has now happened twice while I type -- I stop to ponder what to say next, and Sonar suddenly comes back to life, I play a few bars and click "stop" and Sonar goes back to "Nor Responding".
Now it's happened a third time -- Sonar comes back to life, plays for as long as I let it play, goes to "Not Responding" when I click the stop button.
 
That's where it stands now. Three times is enough, I think... I'll kill Sonar thru Task Manager now...
 
 
 
 

ernietamminga
Does reinstalling Sonar through the Command Center really do a full reinstall?

Here are the instructions for a clean reinstall https://www.cakewalk.com/...n-Install-Instructions

I think the problem is with the Focusrite Scarlett18i8.
The unit won't work with my other software packages that are supposed to be able to use it for audio.
Googling around reveals that a lot of people have reported the same problem.
No one seems to have a fix, though.
I'll log a ticket with Focusrite, but I'm feeling pessimistic...

Does SONAR work if you unplug the 18i8? Have you tried a different cable / USB port?
All the best.

Is it plugged into a USB3 port by any chance?

Response to the last two helpfulnesses:
 
(1)Yes, if I change my output to the computer's own built-in speakers, Sonar does play (but of course I can't record).
    Change it back to the Scarlett, and it crashes. That's why I'm pretty sure the problem is the Scarlett, not Sonar.
(2)I did have the Scarlett originally plugged in to a USB3 port (where it worked just find for several days), then I saw someone's note on the web about using USB2 instead -- so I changed the connection that and even rebooted, but it doesn't change the problem.
 
Pretty sure it's the Scarlett. I'm waiting (hoping) to hear back from their customer support.

From what I read, the Focusrite Scarlett18i8 supports USB 2.0, not 3.0.  I had the same problem with my Roland Octa-capture, I had it plugged into my USB 3.0  port and Sonar Kept crashing.   I then plugged it back into USB 2.0 port on the computer and and Sonar stopped crashing.  
 
Try it out.

Thank you - I'd already changed from a usb3 to a usb2 port (I read about that elsewhere).
No luck.
What's even nicer... once the Sonar crash happens, then the Scarlett is no longer recognized at all as a USB device. If I unplug/replug it, I get "USB device not recognized. The last USB device you connected to this computer malfunctioned..."
If I reboot, the Scarlett is recognized again -- until the first time I try to play something through it in Sonar. Then click/pop! and Sonar crashes, and the Scarlett disappears as a USB device.
If I plug SOMETHING ELSE (like an external disk drive) into that same USB2 port, it works fine. Only the Scarlett is not recognized.
 
Repeat as desired... results always the same.
All had worked nicely for about a week. Then I left Sonar "up and running" (but not actively "playing" anything) while I went out for a while, and when I came back it (or, more likely, the Scarlett) wouldn't work anymore.
Sigh.