Script to eject a tape or check a drive using CLI tools fails with "Failed to start a CLI session (4046509)

Title: Script to eject tape or check drive using CLI tools fails with "Failed to start a CLI session"

Date: Oct 07
Product & Version: All
Module & Version: All
OS Version: N/A
Application version: N/A

Description:
This document explains the error message above and provides the solution to prevent it.

Symptoms:
When the command nvdeviceeject (or any other CLI commands that require a servername to be supplied) is used the error message:

"Failed to start a CLI session"

is displayed and the command fails.

Example (For Linux/Unix):
/usr/netvault/util/nvcheckdrive -servername UKWK1624 -drivename LTO