Just in case anybody else runs across this problem, I'll post the reply that I finally received from Symantec on this issue. We were running BE 11.0.6235, and they recommended upgrading to 11.0.7170. The RALUS agent at 7170 contains the necessary perl binaries for me to complete the installation on AIX.
Now, if I can just figure out the next obstacle... BE seems to be choking on a directory that contains a 4GB file. When we browse the remote directory from the backup server, it doesn't show ANY of the files in that directory. But when I remove the 4GB file, then all the other files magically appear. I'll probably repost this issue as a new message with additional details. But in the meantime, if anybody has any suggestions, I'm all ears!
Thanks in advance.