Here is an old AAX error that was never fixed that is still showing up in Pro Tools 11 with the latest Vienna Ensemble Pro 5 Server version 5.1.12331.

If I create a 5.1 Aux in Pro Tools and instance the VEPro 5.1 insert, then the channel configuration in the Server interface always comes up as Stereo.  If I try to connect to the server then Pro Tools will crash.

This was a problem under the old AAX 5.1, so I worked around it with the RTAS 5.1.  Now I can't do that in Pro Tools 11.

Is there any way to fix it?  Here is an screen grab showing the problem.  I can't make Channel Configuration read 5.1.

http://www.johnmdavis.com/wp-content/JDMP3/misc/VEPerror.tiff

Thanks.  In the meantime I'm learning how to use MIR within Pro Tools, so I think that will also work for me.

I'm afraid I can't reproduce this at all with those exact versions. That bug has been fixed quite a while ago. Perhaps it's related to the amount of audio outputs you have set in the VE Pro preferences?