MNIST RKNN quantization ERROR

[Amazing Superman]

复现 https://t.rock-chips.com/forum.php?mod=viewthread&tid=858&extra=&highlight=%E6%95%99%E7%A8%8B&page=1 量化模型的时候直接报错了这个？ 非量化的模型可以正常导出

E Catch exception when building RKNN model!
E Traceback (most recent call last):
E File "rknn/api/rknn_base.py", line 688, in rknn.api.rknn_base.RKNNBase.build
E File "rknn/api/rknn_base.py", line 2975, in rknn.api.rknn_base.RKNNBase._generate_inputmeta
E ValueError: could not convert string to float:
E Please feedback the detailed log file <log_feedback_to_the_rknn_toolkit_dev_team.log> to the RKNN Toolkit development team.
E You can also check github issues: https://github.com/rockchip-linux/rknn-toolkit/issues
done
E RKNN model data is None, please load model first!
E RKNN model data is None, please load model first!