The joiner works however the joined file afterward can not be dropped into Sony Vegas 9.0c. It hangs up and closes instantly.

Also when the file is played in win media player 12.0.7600.16415 It reflects the length of the original file in the status bar. Eventually it reaches completely across the player but plays the remainder of the clip in it's entirety. Not sure if that's related to the Vegas issue.

I've been getting by with the /b copy command. I haven't been able to do it for more than 2 parts though. Which is fine. I just merge the new copy with the remaining parts, one at a time.