I have same issue.
Ubuntu 18.04
GeForce GTX 1080ti
Driver Version: 418.87.00
CUDA Version: 10.1
libcudnn.so.7.6.2
python3.6
tf 1.14
tensorrt 6
Deeplab model converted to onnx with tf2onnx with opset 11. But have this error in trtexec command:
trtexec --onnx=frozen_inference_graph.onnx
WARNING: ONNX model has a newer ir_version (0.0.6) than this parser was built against (0.0.3).
While parsing node number 0 [Cast]:
ERROR: builtin_op_importers.cpp:727 In function importCast:
[8] Assertion failed: trt_dtype == nvinfer1::DataType::kHALF && cast_dtype == ::ONNX_NAMESPACE::TensorProto::FLOAT
[03/08/2020-09:00:00] [E] Failed to parse onnx file
[03/08/2020-09:00:00] [E] Parsing model failed
[03/08/2020-09:00:00] [E] Engine could not be created