I'm having problems assigning an iPrint policy to about half the machines I install the Zen10 Agent on.

Its a fairly straight forward policy containing 5 Xerox printers. Extra configuration settings include removing any currently installed printers and to forcefully install the iPrint client even if its already installed.

I have nothing configured under the Requirements tab.
I apply this policy to workstation objects.

Example error:

Full Message: Failed to add iprint printer ipp://<domain name>/ipp/CO-FINANCE-XRX.
Additional Information: None
Severity: Error
Date: April 9, 2009 2:53:22 PM
Acknowledged Date: None
Source: /Devices/Workstations/<workstation name>
Message ID: POLICYHANDLERS.PrinterPolicy.IPrintPrinterAddFaile d
Probable Cause URL: None
Log ID: 4b2860d7274d177b936f3f952c109df4
Related Objects: None