Path Computation used in conjunction to PcInit message produce a NAI which is not supported by Cisco & Juniper routers. Indeed, the produce NAI is based on Node-SID + Router-ID while router expected a NAI based on Adjacecy-SID and interface address.

This type of Node-SID NAI is only pertinent for loose path computation while Adjacency NAI is suitable for strict path computation. However, routers are expected a strict path.