Just had this issue occur when I created a new .bash_profile. Check that Navisphere can run against the arrays, then make sure you add the naviseccli bin directory which is usually /opt/Navisphere/bin to your system PATH.
For example, add the following line to ~/.bash_profile:
PATH=$PATH:/opt/Navisphere/bin
export PATH
Then execute this file to make the setting effective by running source ~/.bash_profile
Ref: http://docs.splunk.com/Documentation/AddOns/released/EMCVNX/InstallVNXCLI
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