Getters and checks require a license-file to work. You can download a license-file for your product from the distributors website (portal) typically at the same place from where you got the package with the software.
The license-file has a dat-extension and placing it into the directory
/usr/local/check_netapp_pro/etc will always work. To place it into an other directory consult the executables
To get information about the license (duration, …) open the license-file with a text editor.