Issues with loading in Coco Engine object following

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hello everyone,

I’m trying to train a jetbot, when running the live_demo.ipynb inside the object_following folder:

from jetbot import ObjectDetector
​
model = ObjectDetector(‘ssd_mobilenet_v2_coco.engine’)

Then I get the following error:

AttributeErrorTraceback (most recent call last)
in
1 from jetbot import ObjectDetector
2
----> 3 model = ObjectDetector(‘ssd_mobilenet_v2_coco.engine’)

/usr/local/lib/python3.6/dist-packages/jetbot-0.4.3-py3.6.egg/jetbot/object_detection.py in init(self, engine_path, preprocess_fn)
27 load_plugins()
28 self.trt_model = TRTModel(engine_path, input_names=[TRT_INPUT_NAME],
—> 29 output_names=[TRT_OUTPUT_NAME, TRT_OUTPUT_NAME + ‘_1’])
30 self.preprocess_fn = preprocess_fn
31

/usr/local/lib/python3.6/dist-packages/jetbot-0.4.3-py3.6.egg/jetbot/tensorrt_model.py in init(self, engine_path, input_names, output_names, final_shapes)
57 with open(engine_path, ‘rb’) as f:
58 self.engine = self.runtime.deserialize_cuda_engine(f.read())
—> 59 self.context = self.engine.create_execution_context()
60
61 if input_names is None:

AttributeError: ‘NoneType’ object has no attribute ‘create_execution_context’

Does anyone know what I have to do regarding the situation?
I have already looked at the most common solution on this forum, reinstalling the packages ect

Thanks in advance!

3

Hi,

Which JetPack version do you use?
Please note that the GitHub is tested with JetPack 4.5.

Thanks.

4

I have the JP 4.5

5

Hi,

Sorry for the late update.

The model doesn’t work with the newer JetPack.
Please use JetPack 4.3 instead.

You can find more info in the below link:

Thanks.

7

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