Error when running RTSP using deepstream on jetson nano running on external SSD

I get this error when running deepstream to receive RTSP on Jetson.

Note: I’m running from an external SSD on Jetson nano

Using winsys: x11
ERROR: Deserialize engine failed because file path: /home/moon/Downloads/deepstream_python_apps-master/apps/deepstream-test3/…/…/…/…/samples/models/Primary_Detector/resnet10.caffemodel_b1_gpu0_int8.engine open error
0:00:02.161110620 12341 0x40e82a40 WARN nvinfer gstnvinfer.cpp:616:gst_nvinfer_logger: NvDsInferContext[UID 1]: Warning from NvDsInferContextImpl::deserializeEngineAndBackend() <nvdsinfer_context_impl.cpp:1690> [UID = 1]: deserialize engine from file :/home/moon/Downloads/deepstream_python_apps-master/apps/deepstream-test3/…/…/…/…/samples/models/Primary_Detector/resnet10.caffemodel_b1_gpu0_int8.engine failed
0:00:02.161898396 12341 0x40e82a40 WARN nvinfer gstnvinfer.cpp:616:gst_nvinfer_logger: NvDsInferContext[UID 1]: Warning from NvDsInferContextImpl::generateBackendContext() <nvdsinfer_context_impl.cpp:1797> [UID = 1]: deserialize backend context from engine from file :/home/moon/Downloads/deepstream_python_apps-master/apps/deepstream-test3/…/…/…/…/samples/models/Primary_Detector/resnet10.caffemodel_b1_gpu0_int8.engine failed, try rebuild
0:00:02.161936314 12341 0x40e82a40 INFO nvinfer gstnvinfer.cpp:619:gst_nvinfer_logger: NvDsInferContext[UID 1]: Info from NvDsInferContextImpl::buildModel() <nvdsinfer_context_impl.cpp:1715> [UID = 1]: Trying to create engine from model files
ERROR: Cannot access prototxt file ‘/home/moon/Downloads/deepstream_python_apps-master/apps/deepstream-test3/…/…/…/…/samples/models/Primary_Detector_Nano/resnet10.prototxt’
ERROR: failed to build network since parsing model errors.
ERROR: failed to build network.
0:00:02.162730235 12341 0x40e82a40 ERROR nvinfer gstnvinfer.cpp:613:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::buildModel() <nvdsinfer_context_impl.cpp:1735> [UID = 1]: build engine file failed
0:00:02.162764403 12341 0x40e82a40 ERROR nvinfer gstnvinfer.cpp:613:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::generateBackendContext() <nvdsinfer_context_impl.cpp:1821> [UID = 1]: build backend context failed
0:00:02.162793935 12341 0x40e82a40 ERROR nvinfer gstnvinfer.cpp:613:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::initialize() <nvdsinfer_context_impl.cpp:1148> [UID = 1]: generate backend failed, check config file settings
0:00:02.162854404 12341 0x40e82a40 WARN nvinfer gstnvinfer.cpp:809:gst_nvinfer_start: error: Failed to create NvDsInferContext instance
0:00:02.162878311 12341 0x40e82a40 WARN nvinfer gstnvinfer.cpp:809:gst_nvinfer_start: error: Config file path: dstest3_pgie_config.txt, NvDsInfer Error: NVDSINFER_CONFIG_FAILED
Error: gst-resource-error-quark: Failed to create NvDsInferContext instance (1): /dvs/git/dirty/git-master_linux/deepstream/sdk/src/gst-plugins/gst-nvinfer/gstnvinfer.cpp(809): gst_nvinfer_start (): /GstPipeline:pipeline0/GstNvInfer:primary-inference:
Config file path: dstest3_pgie_config.txt, NvDsInfer Error: NVDSINFER_CONFIG_FAILED
Exiting app

Hi,
It looks like the paths to config file are not correct. Do you have the rootfs on Jetson Nano emmc? Do you connect the SSD to USB port on Nano developer kit?

And please provide the release version( $ head -1 /etc/nv_tegra_release ) for reference.