java.lang.IllegalArgumentException: The value of the sklearn2pmml.decoration.ContinuousDomain.data_min_ attribute (null) is not a supported array type

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The value of the sklearn2pmml.decoration.ContinuousDomain.data_min_ attribute (null) is not a supported array type
java.lang.IllegalArgumentException: The value of the sklearn2pmml.decoration.ContinuousDomain.data_min_ attribute (null) is not a supported array type
at org.jpmml.sklearn.ClassDictUtil.getArray(ClassDictUtil.java:51)
at sklearn2pmml.decoration.ContinuousDomain.getDataMin(ContinuousDomain.java:111)
at sklearn2pmml.decoration.ContinuousDomain.encodeFeatures(ContinuousDomain.java:50)
at sklearn_pandas.DataFrameMapper.encodeFeatures(DataFrameMapper.java:70)
at org.jpmml.sklearn.Main.run(Main.java:146)
at org.jpmml.sklearn.Main.main(Main.java:107)

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