node is gone after using tf-trt in tensorflow1.15 in jetson xavier nx

[techrc]

I want to run facenet in jetson xavier nx. So there is a placeholder node which name is 'input',
i used tf-trt (nvidia-tensorflow1.15) to convert frozen_graph to uff,
the 'input' is gone, i got an error that 'there is no node named input in graph'.
so please tell me what mistake did i make? and what should i do? if you know that.