I've done what you suggested, however when I double-click on my device it opens the Connected Device window. I then select the MSC-400 and the device I want to add the commands to at the top. The area belowthen fills with all the serial commands I added from the data base with numerous open slots. Once I use up all the open slots I need to add additional slots. According to the Complete Control User Doc, I should be able to add up to 1024 commands here. I can't figure out how.