Great to hear from you JimH. I've been using r5--VST32. I don't know what you mean by PB4--what is it? I believe the problem started while using r4. I did read the "what's new in r6" before I downloaded it. I installed it the other day, but, I haven't tried to open one of the few .arr files I have left. I'll give it a try shortly and let you know what happens. I keep posting here, hoping that someone has had the same problem--and that they found a fix. Steinberg says it sounds like a hardware-compatability problem. My sound-card is a SoundMax (full- duplex), but, I use a MOTU828. It is capable of 0ms latentcy, but, I use it at 23ms. The only other added hardware is a MOTU MIDI-FLYER to sync-up the AlesisSR16 drum-machine, and I have no reason (symptoms) to suspect that it is causing my .arr file problem. Thanks again. By the way, what do you use CuBase for?--what instrument(s) do you play? If you get a minute, tell me about your set-up.