Before you perform an upgrade to a Cisco CallManager version, download and run the latest version of Cisco CallManager Upgrade Assistant Utility, a nonintrusive tool that detects the health of the servers in the Cisco CallManager cluster without changing the state of the system.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.