Could not find tensor Relu in tensorScales INT8 Mode TensorRT

I have received the following error:

setting to int8 mode
ERROR: …/builder/cudnnBuilder2.cpp (1508) - Misc Error in buildEngine: -1 (Could not find tensor FeatureExtractor/resnet_v1_50/resnet_v1_50/conv1/Relu in tensorScales.)
ERROR: …/builder/cudnnBuilder2.cpp (1508) - Misc Error in buildEngine: -1 ()
ERROR: sample_uff_ssd: Unable to create engine

Model information

I was trying in TensorRT ssd- Resnet50 model provided by tensor flow. It works fine for the Float 32 and Float 16 configurations.I have made code modifications on sample_uff_ssd provided by TensorRT

The node information of the above is as follows from .pbtxt

nodes {
id: “FeatureExtractor/resnet_v1_50/resnet_v1_50/conv1/Relu”
inputs: “FeatureExtractor/resnet_v1_50/resnet_v1_50/conv1/BatchNorm/FusedBatchNorm”
operation: “Activation”
fields {
key: “func”
value {
s: “relu”