What files are needed for ReWire operation with Melodyne and where are they located?
to the desktop or some other folder (remembering from which original folders they were taken) and then test Melodyne in ReWire mode. If everything seems to be working as it should, begin moving the files one by one back to the folders from which they were taken, testing the ReWire functionality as you go. There will come a point, obviously, where the problems reappear and you will know that the file most recently returned to its original location is the one that is causing the trouble. Move this a second time to the desktop and try out your other ReWire hosts to see whether or not these can function without the problem file. If not, contact the manufacturer of the host in question to discover whether or not a new version of the file in question is available.