The VTR devices available depend on the VTR keyword lines uncommented in the software initialisation configuration file. Make sure the VTR you select is appropriately connected using the corresponding audio, video, and RS-422 connections.
Working with Multi-Format Input and Output.
In certain situations, Inferno pre-selects a VTR with appropriate timing when entering the Output clip module, as described inTo select the VTR device for output: