NOOOO! fkc NO ! there is NOT any fkn EVENT on the end of taht list. what is the problem with this bunch of nituids
I payed for every update soon 1000$ for a program, that has A LLLLOOOOOT more gugs than this. Just to inform you :a after some updatesw ago, suddenly the the keyboard shortcut for F5 F6F7 F8 F9 F 10 stopped to work. and other things is happening, / is unconveinant compraed to toher programs. thesse day they are bussy with having other programs : Izotpe, / Fabfilter and thousands of plugin to work, coz thats where they get the money..... while the program itself fill up with more buGS !!! I regret  VER VERY VERY MUCH that I started with this amateure program  about 10 years ago !!!!

An unusual rant, to say the least.

Old thread, but this has not changed and my answer is what fool does not perform a basic mastering of ANYTHING that leaves your studio. Only a untrained person that's who. 
I often had clients come for a 4 hour session and then want a rough mix to take home. Those do not get burned to CD or transferred to a USB stick with out a quick Top and Tail and check of RMS level. 
I could careless where Sonar puts the start and stop of songs as long as it doesn't chop something off. I've had that happen only on pure MIDI tracks.  I'm always going to top and tail in Wave Lab, takes about a minute to do a quick check over. Always listen to the intro and the outro. And I always balance the RMS level so they get to hear the songs in the car without complaining about loudness issues from song to song. 

Noel Borthwick is correct. Most likely, there was a track with 'track' automation, (gain or panning). The automation will extended past the point of the songs ending unless you right click on the "extra long" automation and change it's mode from linear to jump. It's not a bug, it's intentional, so no reverb tails or echos get cut off prematurely. 

There is one case where Sonar projects will never stop after reaching the end of the project. If you are using Midi FX like Echo Delay, which create new midi events, then playback will really never stop (not only not stop where you expected). Other than this, I never had a project not stopping playback at the end.

In any case, setting From/Thru to select precisely what is to be output is a basic thing to do and will always guarantee you have full control over start and stop of what gets exported.
 
Bob Bone
 

So I read this whole thread and ... well, it didn't help, but maybe someone has a suggestion for how to fix this my issue.  My song is 64 measures long, but sonar thinks it ends at 95 measures.
 
Bit by bit I deleted everything to see what the offending event was.  I have deleted all tracks and buses, as well as tempo changes, key changes, and markers.  It's an empty project.  But it still reads as 95 measures.  What else is left for me to delete?
 
I know I can work around this by manually selecting what to export with the mouse, but I am lazy.  I'd like for when I hit "Ctrl+A" for it to select just where there is song data and nothing else.

I got my not working Stop at End of Project function to work by using the putting the Now Time marker at the end of the song and then using the select module in the Console and clicking "Set From Now" that (should) mark all the measures from the Now Time till the actual end of the song.
Then make sure all the Tracks are selected top to bottom and hit Delete. Hope it works for you.

"Man, imagine if we'd had internet fora when ADAT was a common recording platform. Some of you people don't know what suffering is, I swear."
 
Ten points to John T for using the word fora.

This has got to be the 100 th Thread on this topic... Sorry folks,,, it's called Mastering and if you think you can do both mix down and mastering in one step,,, you'll still have this issue.