Interesting find.  I have a project that I was working on last night that is all midi. 
It stopped at, say, 105:1:00.
Once I added DM (for some additional sounds), it now doesn't stop, but continues on like the OPs issue.
I checked the Event list, but nothing's showing up. 
Any ideas? 
by the way, there are no hidden tracks.

I think maybe the question and the answer are not syncing.
Example - I have a 30 minute 4-track tape I want to lay down as 4 separate tracks in Soanr.  Don't get lost in the details here, its not important except for the 30 minutes of tape.  Here is what we want to do:  Hit the "Play" button on the analog 4-track input device and hit the "Record" button in Sonar.  Ok... we're recording.  Now - I want to go to bed!  I want my Sonar system to STOP recording in 30 minutes.  I can't be there to hit the STOP button in Sonar.  I don't want to continuously record while I sleep, only to wake up and say dammit I'm out of hard drive space because I only had 30 minutes of audio to record and Sonar just kept recording and recording and recording...
 
Get it?
 
I want to set it... and forget it....
 
(So, is that what you were looking for?  If not - sorry man.  But that's what I am looking for!  LOL)

This is a 4 year old thread, I'm sure he's figured it out by now

Bristol_Jonesey
This is a 4 year old thread, I'm sure he's figured it out by now

Has he? Is there an answer?
This is still one of the most common issues on this forum, and has always been. I face it frequently. No matter what's in the project, one single audio track without automation or FX, or a 40 track one with all possible stuff. Sometimes it stops, sometimes not. Not a biggie to me, though, as I've settled with 8.5 and I know there's no help coming. 
IIRC what I've read on the forum, the problem still exists in the newer versions (?).
 

The solution, as it's always been, is to swipe in the time ruler to export exactly what you want, no more & no less.

I have all my projects set to "Stop at Project End" under the options menu in the Track view. I know that doesn't solve the issues many are mentioning, but it's easy to miss.
 
Hope this helps a few people.

Bristol_Jonesey
The solution, as it's always been, is to swipe in the time ruler to export exactly what you want, no more & no less.

That's not actually a solution, though your condescension is impressive. What if you have a project running multi-track backing, lights, program changes etc, and all you want it to do is stop at the end. Not really too much to ask.
 
Kalle is right. This problem certainly still exists. I am running Platinum. I have about 300 projects for my live show, all of which have been updated and re-saved in platinum. Five of them will not stop at the end and no matter what I do, and there is no data further along the timeline. Also not a biggie for me, but annoying.

I recently wrote to Cakewalk with this and a related problem and said - " that some of my projects were 2 or 3 times the length that they should be. I suspected that the problem related to insertion of a sample because it would not insert the sample where I wanted it and would place it at least 3 minutes away from where my song should have ended. Even if selected undo and not place the sample at all, it seemed to remember the extended project length". Cakewalk replied and said - "You can avoid this behavior by going to Edit > Preferences > File > Audio Data and uncheck the 'Always Import Broadcast Waves at Their Timestamp' check box. Then, click Apply and Close.

tenfoot

Bristol_Jonesey
The solution, as it's always been, is to swipe in the time ruler to export exactly what you want, no more & no less.

That's not actually a solution, though your condescension is impressive. What if you have a project running multi-track backing, lights, program changes etc, and all you want it to do is stop at the end. Not really too much to ask.
 
Kalle is right. This problem certainly still exists. I am running Platinum. I have about 300 projects for my live show, all of which have been updated and re-saved in platinum. Five of them will not stop at the end and no matter what I do, and there is no data further along the timeline. Also not a biggie for me, but annoying.

How on earth was that condescending?
 
Why is it that all of my projects stop exactly at the end of the last piece of data, where they should be stopping?
 
If you'd bother to read the countless number of threads on this topic, the conclusion is 100% clear - there is ALWAYS something further down the timeline which has not been picked up by the user.
This could be, but is not restricted to, Meter/key changes, envelope nodes, tempo changes, midi data, data in archived tracks, data in hidden tracks, data in hidden busses, audio data imported at the wrong time stamp.

Not sure if you've resolved this
Not sure if in properties/clip inspector if it is possible to set length/end time, and/or select track sections and bounce into a single clip, and/or normalize comp tracks, I know I had this issue at one time, but don't remember exactly how I resolved it, and now its just integrated into part of my workflow, or if a patch fixed it, but don't seem to have issue any more, if I recall on next project Ill post.