Enter the serial number that you received in. Ni Mdns Responder 14.0 For Labview Real 2 key code generator. Ni Labview-multisim Co-simulation Plug-in 12.0 For Labview 2011, v.12.0.923 serial key gen.Enter the activation codes and click Next to activate. Select the Apply one or more 20-character activation codes previously acquired for this computer option to activate using your activation code (s). Click Activate Products on this screen to open the NI Activation Wizard.o In the NI License Manager select the Multisim Base o In the NI Activation Wizard click the Apply one or more 20-character activation codes.