We are using XenServer 8.0 and PVS Accelerator the CVAD wizard will fail to create new devices.  When an AOT trace is captured and analyzed you will see the following errors in the logs:

PVS_Dll_HypervisorPlatforms_AO,,0,,5,Information,"XenAPI failure, error description: System.Collections.Generic.List`1[System.String]    [PlatformXS.cs(1020): LockedTryCatch]",""
,PVS_Dll_HypervisorPlatforms_AO,,0,,5,Information,"                exception: The device name 2 is invalid    [PlatformXS.cs(1021): LockedTryCatch]",""

The template used to create the device has a NIC attached that has a device ID higher than 0.  The solution is to delete the NIC and recreate it with a device ID of 0.

Problem Cause

Issue was caused by the VM template using a device ID for the NIC that was not 0