Hi, everyone. It's been a long time since I've been on the forum. Let me give a shout out to Planetearth, Jimbo 88, and Large Style. Thanks, you guys, for helping me out in the past. As you can see from my signature, I now have a monster system which I recently built and am running SONAR Platinum. At present I have a project with basically a rock band setup (multiple vocals, three guitar tracks, bass, drums, B3 organ), which has about 25 different tracks. This really should not be taxing my system at all. I have been having a great deal of trouble with audio engine just simply cutting out, all the time, at unexpected times. I have started tracking the usual suspects, and made some progress. I can now get my project to play through without a problem, but I cannot export anything. I went into BIOS and deactivated hyperthreading, all enhanced power saving options, C-states, and other options which might be a culprit. I've gone into task scheduler and deleted every unnecessary program there. The ones I left I am pretty sure are not a problem. I tried to alter the audio buffers in ASIO and tried them from 16 all the way to 1024 without any effect. I tried altering my playback and record I/O buffer sizes as well, again without any effect. I've tried looking at computer events and aside from deleting Apple's Bonjour did not find anything else of note. I downloaded LatencyMon and checked the system with this app, but it could find nothing wrong. In fact my delays were never any more than 250 µs, both DPC and ISR.
        So now I am stuck. I am trying to export the individual tracks as wave files, but every time I try it, the audio engine suddenly cuts at various times, sometimes as little as a second, sometimes as long as a minute or two. I've yet to get one completed wav file out. I've tried looking at the Task Monitor and cannot see any unusual I/O problems occurring with the disk drives or the CPU. I don't know where to go with this problem now. I hope one of you guys out there could help out. Thanks in advance.

How are you exporting them? Thru the file menu or dragging the clips out to the desktop?
 
Have you tried bouncing the tracks before exporting?
 
What plugins are you using?

If "Fast Bounce" is not enabled on the export dialog, try enabling the feature.

Thank you, soens and scook, for your responses. I initially tried fast bounce and it didn't work either. The reason is about 90% of the time I try a fast bounce, there is no sound in the resulting file. That is why I then went to a slow bounce to actually listen to what was being transferred to the file, and thus my present situation with the audio engine cutting out. As to the exporting, I am trying to export them directly from the menu under the file tab. I tried to bounce to track as well. It still does the same thing, the audio engine cutting out after a few seconds and not allowing the bounce track to be created. I haven't tried to drag the clips to the desktop. I don't know how to do that. I am not doing post production work here. I am sending these stems elsewhere for that. I have virtually no plugins being used, only Cakewalk's Boost11 on some tracks just to boost gain. I have two virtual instruments, VB3 (B3 organ emulator - very good one BTW), and Cakewalk's TH3 for the guitars. The remaining tracks are all purely recorded raw.

have you tried unchecking 64 bit engine ?

 
As a test you might want to delete the VB3 tracks just to see if its something within that which may be causing a problem.
Use the Process and elimination formula.

Thanks, chuckebaby. The 64 bit engine was already unchecked. I tried it checked on as well, but either way it did not work. Deleting the VB3 track also had no effect.

When you say you had no sound in the files exported using fast bounce. Did you try "select none" found under edit  ( or CTRL/SHIFT/A )  i had the same issue from time to time when using "select all" and someone here advised to use select none and since then never had an issue with export. I always use the fast bounce. 
What are you exporting at, 44.1 or? 
 
You certainly sound like you've looked into every rabbit hole as far as background interference which can be common on an un optimized machine. Latency Monitor usually sorts that out. 250 is not ideal but within a safe area. But I've heard people talking about little spikes that don't get picked up. 
For me it's always been disable the internet adaptors and on laptops battery management. Video cards are another source of grief and most folks will disable the HDMI audio. 

        Hmm, very interesting, Cactus Music. I am exporting at 48K, 24 bit. Doing 44.1K 16 bit didn't seem to make a difference, but when I select the preset option of "none" (I could not find any "edit" section on the box, so I think that "preset" was what you meant.), which of course unchecked everything. That worked, but then I got none of the FX's on my guitar tracks. So I rechecked everything except for the bus sends (since I didn't have any of those except for drums) and left the 64 bit machine also unchecked, and that seemed to work on Fast Bounce. Everything went through and I got all my tracks out ready to send. Just for grins, I tried to slow bounce it with audible bounce and the audio engine crapped out again. I do not have HDMI audio activated. My monitor connects through Display Port anyway. So I think I have a work around for now, but I still would like to find out what's crapping out my ability to do an audible bounce. It definitely should not be happening on this machine by any stretch. Thank you so much, Cactus Music, I have a temporary fix for now. Thanks to all you guys for your responses.

I don't think he meant the preset 'none' as you will want a lot of the stuff that selecting it will deselect, FX, Automation etc etc, as you have found. I think he is referring to track selection, which is why CTRL/SHIFT/A was mentioned, as it will deselect all tracks and buss's, kind of sounds a bit funny having none selected, but . . .  that's how it is.

I haven't tried to drag the clips to the desktop. I don't know how to do that.

 
Simply click - hold - and drag, as you would move anything else.
 
Click here to see how.