I've been having this odd problem on and off for a long time, over many versions of VEP, and am wondering if this is a known issue at all. It's not deadly, but very irritating. I work in Digital Performer 7.24 and a Mac Pro. The bulk of my VSL library is on a slave PC, Windows 7 Professional, with all the sample libraries on SSDs. Both computers have heaps of power. Normally, everything works perfectly. But then...
So I'm currently working on a feature film and have about 30 different "chunks" in DP representing different cues of the film. There's a lot of live audio tracks and the occasional virtual instrument in the main sequence, but most of my virtual instruments are in a V-rack as most of the film uses the same basic template. I have an 32-bit instance of VEP in there hosting GVI on the slave machine, a 64-bit instance hosting 16 VSL instruments using MIR on the slave machine, and Vienna Imperial on the host computer.
I've been working on this project happily for several weeks, then today left everything running when I went for some lunch. I can back, and the 64-bit VEP was disconnected. When I tried to reconnect, I got the error message on the PC, "The project you are trying to load was created with a newer version of Vienna Ensemble Pro. Please download and install the latest version at..." I have the latest versions of everything on both machines. Other projects open fine, but this one doesn't. I tried restarting both machines, but the same error comes up when the project tries to open.
I went to a backup of the project file. That opened fine. I saved the 64-bit instance as a viframe, closed the backup project. Reopened the main project. Got the error. Dismissed it and loaded the viframe, and everything works fine.
So like I said, it's not deadly. As long as I keep project backups and/or save viframes of every project as I go, I can recover from the error. But if there's any way to avoid it, that would be much preferred! I suspect it has something to do with DP as the project file gets larger over the course of a big project, but I don't know. Any ideas would be appreciated.