Hi @js12459743,
Using the yolov8n.har means that you’re not compiling your model, but probably the default one. I guess that among other things, maybe the nodes that connect the NN model the NMS were changed, and this is the reason that the tool is unable to connect it.
I would suggest to either take a look at the suggestions made by the parser per the output node names. Or, examine the net in netron, identify what are the nodes prior to the NMS and update the network yaml accordingly.