the update on some XP machines has failed with error:

There was an error while installing package novell-zenworks-actions- MSI return code: 1601. Check the system-update.log on the device for details


An error occured while downloading the update content to this device. Make sure that this device has valid content servers configured via closest server rules and that the content replication has occured to this devices content server(s)

All XP devices are installed in the same subnet with the same policies/agent versions.

Any ideas?