My Beethoven plays fine in real time but when I record to wav using Garriton Studio I get long sections of silence in the middle of the piece. I'm using 3 instances of Kontakt with a total of 19 patches on a 3.2 GHz Pentium.
The odd thing is that the forte passage with all instruments playing seem to work fine most of the time. Many of the 5 to 10 second silences are in softer passages with fewer instruments playing.
I'm not very sure what is causing it, but it could be related to background services interrupting and reading/writing (VirusScan in particular). Things you might try are adjusting the latency settings as high as they will go and optimizing your PC. Check musicxp.net for some starting points.
Randy: I'm using the method suggested in the tutorial on using GPO with Noteworthy. I'll have to take a closer look to see if I'm using an outdated approach.
I did solve the problem by increasing the buffer size to max in Garriton Studio. Or maybe the problem just went away if it was connected, as Reegs suggested, by background processes. Anyway, for now, I did manage to complete the render.