Batch loudness correction sometimes adds small parts of audio from other tracks!

I don't think you need two temp folders - certainly not if you don't have 22.0 on the system any more. In the temp folder settings there's an option to set up a secondary temp location too. I've never had it set, and nothing's ever gone wrong. The ideal situation is a separate drive just dedicated to temp folders - which is what I have on my DAW. If you can't run to a separate drive, then a dedicated folder on the root drive of your system is the next best thing.

Thanks for your response Steve.

My temp files are stored on my main hard drive. It's a reasonably new mac with ample storage space.

I did notice when I looked in the temp storage folder under Library/Caches/Adobe/Audition that there are two temp folders there one for the curent version I'm running (23.0) and one for the previous version (22.0), altough it doesn't look like the 22.0 folder is being accessed when processing.

Do you think having two folders in the same location for temp files might be the problem? If not where would you suggest to be the best place to save the temp files to?

Thanks

Douglas

I think that the trouble here may be that you are rather forced to do this in Waveform view, and this involves the use of a temp file (or indeed several of them). In general, things behave way better with temp files if you can set your primary temp drive to be in a place where it can't be 'disturbed' by other things going on. I know that this is a particular issue with Windows machines, and I'm not quite sure about the arrangements on Macs, but in principle the same thing could apply. But it really does sound like a classic temp file issue, though - that's the first place to look for trouble.