Not from the host, no. But you can send it via the port directly (ala lh_midi external in m4l), or to the physical MIDI connection on the Virus (which when not connected via USB link is capable of responding to the sysex).
Still, it would be greatly preferable to just have access to this as a parameter in the VC plugin. Is this not possible for some technical reason? (other than implementation....)
I'm using a ridiculously complicated workaround at the moment that incorporates a m4l patch that latches to the VC's parameters so I can control the parameters from Push depending on which track I have selected. It also allows me to record automation on their output channel, instead of needing to do it where the VC plugin is located. Still, remote front panel patch selection is definitely a feature that needs to be available....I've so far found no way to do it. My setup sounds very similar to yours. When I get things in a state that they work reliably, I'll publish the patch with the next version of Monomodular.
I made a feature request post here, please add your voice to it 
http://www.virus.info/forum/in…page=Thread&threadID=5119
Cheers!
a
You can do it with a sysex message to the Virus, but only when VC isn't connected. Apparently, when VC is linked via USB, the Virus no longer recognizes sysex input.
It also transmits this sysex data when you change parts, so it's pretty easy to decipher what you need to send in conjunction with the Virus C Manual available elsewhere on the forum. I got it working in standalone mode the other day, but found it useless since the sysex reception for Page C parameters seems to be disabled when VC is active.
It would solve a lot of problems created by the various workarounds required for using Virus Control if I were able to automate the selection of the currently active Part Number to coincide with changing the selected track in my DAW.
Since it's necessary to put a separate "External Instrument" for each part I want to use, I access many features from the front panel of my Snow. However, I always have to manually change Parts on the TI to match the corresponding selected instrument in Live. This is horrible for Live use.
There is a sysex command (C123) which makes it possible to perform this function when in standalone mode, but all sysex functionality seems to be disabled when running in Seq mode with a USB Link established. This is very unfortunate 
Can you please either add the Part Number to VC's automatable parameters or provide another way for us to change the active part?
a
+1.
Nothing but issues for me since I got it. A "No-Audio" option for the current plugin can't be too much of a stretch, and should prevent some of the problems.
