The first part of my post here is regarding your above post about your system specs and latency checking, and not actually about your reported issue - thanks for bearing with me.
I am a bit confused. You indicated you ran DPC Latency Checker, but DPC Latency Checker does not report times properly in Windows 8 or 8.1, and according to their site if it is run on a Windows 8/8.1 OS that it will indicate a problem.
Here is the relevant content from the web site on the issue:
"Windows 8 Compatibility: The DPC latency utility runs on Windows 8 but does not show correct values. The output suggests that the Windows 8 kernel performs badly and introduces a constant latency of one millisecond, which is not the case in practice." I recommend you download and run LatencyMon instead. The link for downloading that is:
http://www.resplendence.com/latencymon Download and run the above for 4-5 minutes, with Sonar not running, to get an idea of how well the system can handle streaming audio applications, such as Sonar.
And, you will likely end up with lots of posts, which is great, but to help avoid folks having to keep asking for your system specs, I encourage you to edit your Forum Profile's Signature, and add your system specs to that, and when doing so also check the box that tells the forum software to always include your signature with your posts. That way we will always have an instant understanding of the system you are running Sonar on.
You can look at the bottom of this post for an idea of what to list and how, or look at some others who have their specs listed, for examples.
I am a bit curious on what Driver Mode you are using in Sonar (ASIO or WDM), and also I would like to know your Total Roundtrip Latency, as reported in Sonar. Driver Mode can be seen by going in Sonar to: Edit>Preferences>Audio>Playback and Recording, and Total Roundtrip Latency is found at: Preferences>Audio>Driver Settings.
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OK - now on to the issue you reported with the recording stopping after only a very brief time.
I understand the first part of your post, that when recording either by using your instruments or by using Piano Roll View, that the recording stops after only advancing a very small amount.
Then I get REALLY confused, by something you indicated later in that first post. Here is your text that confuses me:
"I do have the same situation when recording instruments through my interface, the clock stops at seven-tenths, but in this case it continues recording until I stop and plays back the entire recording." Can you please explain that again for me? You seem to be saying that it DOES continue to recording, and then it plays back, but your post is about it NOT continuing to record, so I am not understanding what exactly is happening. So, please take another stab at explaining what is happening.
I am not trying to be difficult - I am just trying to understand the situation, so that I can help you figure out how to fix your issues. :)
Perhaps you could detail the project - what is in it, tracks, instruments, external gear, etc, AND also detail the steps you are doing when you are recording and the problems are happening.
Thanks - sorry if I am dense.
The only things I can think of, off the top of my head, are weird things like either some sort of clock setting issue with external gear, OR maybe something like a resource conflict between Sonar and either Windows or some other application both trying to grab the audio interface.
SO, in addition to the other information I asked you above to post:
1. What is your current Windows Default Audio Device set to? (Your interface? On-Board Sound?)
2. Are any other applications running at the same time you are running Sonar?
3. In Sonar Edit>Preferences>Audio>Playback and Recording, do you have the box checked or unchecked for: Share Drivers With Other Programs?
Thanks - please DO post all the requested information, and I will try to help you get this figured out.
Bob Bone