David is right. Check the connectivity between the agent PC and the CTI server. Also check your name resolution, your agent PC should be able to resolve the CTI server's name to an IP address, if necessary create a local host file on the agent PC with that name resolution.
Thanks for the reply . Name resolution to the host file is correct and also my connectivity is fine. It happened in only one particular PC and now no user is able to login to the PC. CTI set up has been Re-installed still Facing the same problem.
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.