I'm hoping someone can help me. I have 17 Macs running NUDC 5.3.1 logging to a server without problems.
I have one machine that I try to get NUDC running on but when either Calendar or Contact is launched, I get a Window telling me:

"Now Up-to-Date & Contact appears to be damaged and should be reinstalled from the original installer. Error -193"

I had run the uninstaller, rebooted, and reinstalled; Same message.

This is on a Dual 2 GHz Mac G5, 4GB RAM, MacOS 10.4.10, although the problem was there in earlier versions of the OS. Any advice would be appreciated.