Hang in SONAR 4 - why?

Hi. My first post.

Been using SONAR since it was Cakewalk 2.0 for DOS. Just updated with the 4.0.3 patch, but still having the following problem.

Once in a while - maybe once an hour of intense MIDI editing - SONAR will crash on me. It only happens when I stop a sequence, and I always use the space bar to stop & start playing. It will do it if I have one MIDI track, or a mixture of MIDI and audio, or just audio. The whole computer doesn't crash, just SONAR- I can click to other windows and look at other programs I might have running, but SONAR has stopped responding. The CPU meter does not peak or anything when this happens. It immediately freezes when I hit the spacebar to stop a running sequence, and no keypress or click will get its attention - until I click the X in the upper right corner, and Windows XP offers to shut the program down for me.

I believe I have been having this problem since running Cakewalk Pro Audio 9.03, but it's only been lately, when I have spent more and more time editing MIDI, that it's become a real annoyance. I even took a Cakewalk rep aside at the last Game Developers Conference, after his presentation on why I should buy SONAR 4 (I did) and told him about my problem - and when I emailed him about it afterward, I never heard from him again.

It happens so sporadically that I forget about it for a while - and then I lose an hour of editing because I hadn't hit SAVE in a while, and I'm mad enought to do something about it again.

I'm away from my system at the moment but I can tell you I'm using a LynxOne audio & MIDI card on my 1.8 GHz machine. I think I have 256 MB of RAM but it might be 512, I forget. Enough to run lots of audio channels at once. And it's Windows XP.

Any ideas?

Matt

Have you installed SP 2 for Xp. There is an issue with a memory leak in WinXp SP2 that can affect SONAR. There is a patch somewhere in Microsoft land that deals with it. I found out about the leak somewhere here in the forum and tracked down the patch somewhere. Sorry, I can't remember where but you should be able to find it if I did.

bytesizesound. I am experiencing that very said issue. But I am on P3.1.1. I strongly suspect the sound card drivers is causing this. Sometimes Sonar would just quit leaving the midi indicator in the tray area. I am kind of certain it is not Sonar. When I was on Logic I used to see similar crashes. Service Pack 2 would not solve that problem. I was still experiencing it when Ihad it installed.

I have the same problem. Have you looked in task manager to see if it shows CPU usage? When it happens to me, Sonars CPU meter shows no usage, but if you hit CTRL -ALT-Delete and hit the performance tab, it show 100% CPU useage in Windows.

I don't show 100% CPU usage normally. I also use Sonar with Gigastudio and GPO and it doesn't show 100% CPU usage.