An error occurred when the dataset contains string features

[Archmagegck]

My dataset contains some string features, and I used StringIndexer + OneHotEncoder to encode them. When I put the StringIndexers, OneHotEncoders, VectorAssembler, and LightGBM in a pipeline, and fit the pipeline, everything is ok.

But, when I want to saved the pipeline into PMML, an error occurred. The error log is: Py4JJavaError: An error occurred while calling o353581.buildFile.
: java.lang.IllegalArgumentException: Field userinfov4_worktype has data type string

userinfov4_worktype is one of the string features.
I used jpmml-lightgbm-1.2.13.
Thans for your help.

[manchandagaurav]

Hey,
Did you find a resolve for this, we are facing the exact same issue.