I'm trying to use Tektronix CDS 73A-453 module for sending data through a MIL-STD 1553b bus to a remote terminal in a VXI system. While using the driver provided for 73A-453 by the manufacturer to send data through a bus controller to a remote terminal, LabVIEW 6.1 SE says that there are four file missing, namely, "VXI Send Message.vi" , "VXI Receive Message.vi" , "Open VXI instrument.vi" and "Close VXI instrument.vi". Where to find these files. Please mail me these files if you have it. My e-mail ID is rajan_giri@hotmail.com . Thank a lot. Bye