Since TAO5.0, the training result will be .pth model instead of .tlt model. And the exporting result will be .onnx file instead of .etlt model.
So, you can deprecate tao-converter tool. Just use trtexec instead.
Then please refer to TRTEXEC with PointPillars - NVIDIA Docs to use trtexec
to generate tensorrt engine.
For previous .etlt model in ngc, you can use below way to change the etlt file to onnx file.
See tao_toolkit_recipes/tao_forum_faq/FAQ.md at main · NVIDIA-AI-IOT/tao_toolkit_recipes · GitHub