Send UNIX login no longer working after "SuperDupe"

Question

I used to be able to login so smoothly to every computer using the send UNIX feature of ARD 3.1. Recently, I used SuperDupe to re-image all of the machines in my lab. Now, when I try to login, the only machine that works is the original machine (the non-SuperDuped machine). The rest get the following error message...
execution error: An error of type 13 has occurred. (13)
Here's the script that used to work...
osascript -e 'tell application "System Events" to keystroke "welch"'; \
osascript -e 'tell application "System Events" to keystroke tab'; \
osascript -e 'tell application "System Events" to delay 0.5'; \
osascript -e 'tell application "System Events" to keystroke "w"'; \
osascript -e 'tell application "System Events" to delay 0.5'; \
osascript -e 'tell application "System Events" to keystroke return'
FYI: it appears to not like the KEYSTROKE part of the script.
I wonder what the difference is??? I've tried repairing rights, OS updates, client updates, etc. I'm baffled.
--nw

Answer 1

After an insane amount of testing and research, I found that perhaps the problem was related to an Applescript Dictionary. Apparently, my "System Events" Applescript Dictionary was getting lost in the shuffle after SuperDupe.
I resolved the issue by simply not using SuperDupe. I ended up using Disk Utility instead and, although more laborious, it in the end worked.
--nw