Bluetooth Mesh TX power on nRF52

I'm playing around with the light and switch examples with the Bluetooth mesh SDK on nRF52832 devices. I'm trying to find out what the maximum distance would be given changes in TX output power. However, every time I make a call to the sd_ble_gap_tx_power_set function it returns an error.

I'm guessing this has something to do with the mesh SDK? Does the mesh SDK support changes in TX power?