In order to troubleshoot anything you need to analyze logs once everything else including reviewing configuration did not reveal the issue. Reading CUCILnc logs is no different than reading any other logs, you replicate the problem, take a note of the time and start at that a point in the logs. As I indicated earlier the "core" log is your best option to see what is going on, you search for "error", "exception", etc.
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.