No converter registered for op type: Identity

I try convert onnx into tensorrt plan file for restnet-50, but report error:

.input: "convolution_output48"
output: "activation_output48"
name: "Identity48"
op_type: "Identity"
domain: ""
terminate called after throwing an instance of 'std::out_of_range'
  what():  No converter registered for op type: Identity
Aborted (core dumped)

any good suggestions to avoid it?

Hello, can you provide details on the platforms you are using?

Linux distro and version
GPU type 
nvidia driver version
CUDA version
CUDNN version
Python version [if using python]
Tensorflow version 
TensorRT version

Any usage/source file you can provide will help us debug too.

i have the same type error
CUDA:9.0
OS:centos
torch:1.1.0
tensorrt:4.0.1.6
model:pix2pixhd
cudnn:9.0
gpu:Tesla V100
https://github.com/NVIDIA/pix2pixHD
wen i run onnx on trt:
python test.py --name label2city_1024p --netG global --label_nc 0 --no_instance --onnx ./test.onnx
error:
input: “207”
input: “208”
input: “209”
output: “210”
op_type: “InstanceNormalization”
attribute {
name: “epsilon”
f: 1e-05
type: FLOAT
}
terminate called after throwing an instance of ‘std::out_of_range’
what(): No converter registered for op type: InstanceNormalization
Aborted