# :SYSTem:SOFTware:LICenses:INSTalled?

Package and Licenses Commands

- :SYSTem:LKEY:SOFTware:SUPPort:EXPiration:DATE?
- :SYSTem:SOFTware:VERSion:DATE?
- :SYSTem:SOFTware:LICenses:BORRow?
- :SYSTem:SOFTware:LICenses:FEATure?
- :SYSTem:SOFTware:LICenses:INSTalled?
- :SYSTem:SOFTware:LICenses:REFResh
- :SYSTem:SOFTware:LICenses:RETurn?
- :SYSTem:SOFTware:LICenses:VERSion?
- :SYSTem:SOFTware:FEATures:ENABled?
- :SYSTem:SOFTware:FEATures:VERSion?

## Query Syntax

    :SYSTem:SOFTware:LICenses:INSTalled? "<license_model_number>"

Where <license_model_number> is the identification string representing a license.

## Query Response

Boolean, 1 or 0

## Description

Returns 1 (true) if the specified package license is installed and 0 (false) if the license is not enabled.

For a list of the valid license model numbers, see Application Licenses and Protocol Licenses.

Be sure to enclose the parameter with quote characters. Entering an other parameter (or no parameter) results in an –224, Illegal parameter value message.

To return the version of an installed license, use the `:SYSTem:SOFTware:LICenses:VERSion?` command.

## Example Query

    :SYSTem:SOFTware:LICenses:INSTalled? "D9320JITA"