strange intermittent duplicate command problem

[PeterScherr]

Hi,

for the first time, I have encountered this problem after many years of trouble free duplication.

Using duplicate to create one long file from many short regions, I end up with a file that starts normally. partway through it is as if greatly amplified and totally distorted with clipped waveforms. On clicking command Z, the original waveform diagrams appear, but the audio is messed up just as before.

What sort of problem is this? Disk related, perhaps?

Mix3 OS 9.2.2 G4 1gig

Peter Scherr