Hi @liyingyin,
This STM32CubeMX plugin, X-Cube-AI, is out of date.
We recommend using the new graphical tool STM32CubeAI Studio that comes with a more recent version of the compiler (ST Edge AI Core).
STEDGEAI-CUBEAI | Software - STMicroelectronics
Please try to convert your model again and let us know if you still encounter your issue.
The issue indicates an error of communication with the validation application running on the target. It seems that the model itself successfully generated.
Have a good day,
Julian
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