I'm seeing an intermittent output bug that maxes out the output signal. See graphic below in a stripped down project (note project is not even running). If I export to audio, the wav file is DC at the maximum negative value (which speakers don't appreciate). I can't find steps to reproduce this, but it happens in multiple projects fairly randomly and frequently. So I'd like to know if anyone else has seen this sort of behavior?
 
Cheers, Peter.
 
p.s. I have re-installed twice, re-installed audio drivers.
p.p.s. Re-opening this stripped down project, I can't get the bug again, but the original larger project often exhibits this problem.
 

I have never ever seen anything like that. Not in Sonar or any other DAW. 

I've seen this with certain plug-ins. Which effects are inserted when this happens? I used to have this happen a lot with the VX-64 in particular. I haven't done any scientific testing but it seems to happen only if I load older projects that had it.
 
If I close SONAR, unplug USB from the audio interface, plug back in, then open SONAR, the problem goes away seemingly every time.

Anderton
I've seen this with certain plug-ins. Which effects are inserted when this happens? I used to have this happen a lot with the VX-64 in particular. I haven't done any scientific testing but it seems to happen only if I load older projects that had it.
 
If I close SONAR, unplug USB from the audio interface, plug back in, then open SONAR, the problem goes away seemingly every time.

According to the screen capture, no plugin is inserted.

My first question:
What interface are you using? I'm on mobile so can't see if you have anything listed in your signature.

Without a plugin inserted I would first suspect hardware.like Craig I've only seen this in connection with some plugin or another, also intermittent and not reproducible by recipe. No problem report issued by me.

I was starting to suspect Ozone 6 (64 bit), since that is in all my projects, and disabling it stops the problem - but re-enabling starts it again. That stripped-down project in the graphic has no plugins at all, although it started out having Ozone. I've also seen this happen on a Send bus with Sonitus reverb.

Mike - I use a Scarlett 8i6, latest drivers, tried re-installing them. I think the problem comes before the hardware, since I can write an audio file that is DC.
 
 

DC? Direct Connect or Direct Current?
 
 
To remove DC offset from existing audio
1. Select the audio data and choose Process > Apply Effect > Remove DC Offset. This launches the Remove
DC Offset dialog box.
2. Choose from the following options, and click OK:
DC Offset Threshold (dB). You can set a minimum dB threshold. If the analyzed DC offset is below this
value, no removal takes place.
Analyze Left Channel (dB) and Right Channel (dB). This field displays the DC offset separately for the
left and right channels. Press the Audition button to update the display.
Compute DC Offset from first 5 seconds only. To speed processing, select the Compute DC offset from
first 5 seconds only check box. Only the first five seconds of a sound file will be analyzed when measuring
the DC offset. The only time that five seconds is not sufficient is if a long fade-in or mute has been applied at
the beginning of the file.

Direct current, as in the audio file is all -32768, the largest negative 16 bit number. No filtering is going to recover audio from that :) Interestingly, in a larger project showing this problem, Ozone doesn't see a DC signal (in the dither module). In fact, I'm beginning to suspect Ozone strongly, since there is no signal going into it, and DC coming out. Verified using SPAN either side of Ozone in the FX bin. Except my stripped down project didn't have Ozone in it (although it did in the beginning). Curious!

I use Ozone 6 adv. sitting on my master bus permanently once I get past the mixing stage and have never seen anything like this with it. I dont know what I can suggest but when I've had odd occurrences it's always ended up being some out of the way weird thing like a windows setting. I've usually only found a solution by accident.