TensorRT downgrade

I upgraded TensorRT to version 4, however my code is no longer compatible on DRIVE PX2. Just wondering if there’s any safe way to remove TensorRT4 and install TensorRT3?

Dear wzho0776,

Maybe you already have TensorRT-3.0.2.Ubuntu-16.04.3.aarch64.cuda-9.0.cuddn7.0.tar.gz file on a HostPC.
So please refer to “Tar File Installation” in TensorRT3.0 installation guide doc. Thanks.