WYCA, just wondered: did you have any of the computers on Wavelab 8.0.x with or without the same problem, or did you just go straight from Wavelab 6 to Wavelab 8.5? I’m running Wavelab 8.0.3 on one Win 7 64 computer here with RME HDSPe AES for a long time now with no disconnects ever. Have you tried 8.0.4 as an additional install?