Mesh dfu transfer - no such command 'genpkg'

[Hareesh]

I am trying to do mesh dfu package transfer. Trying out the steps given in nrf infocenter.

getting the error : No such command 'genpkg'.

[Hareesh]

I am a beginner to nrf.  Need more suggestions on how to perform the dfu transfer for mesh network.

Is there any already existing code for gateway which has device auto detection and conncetion?