Isofor and r2pmml

[jwveld]

When trying to create a PMMLL file from a trained model with r2pmml it gives me the following error.
Is this solvable?

Jan

dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
INFO: Parsing RDS..
dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
INFO: Parsed RDS in 14 ms.
dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
INFO: Initializing default Converter
dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
INFO: Initialized org.jpmml.rexp.IForestConverter
dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
INFO: Converting..
dec 10, 2017 7:25:03 PM org.jpmml.rexp.Main run
SEVERE: Failed to convert
java.lang.IllegalArgumentException: xcols
at org.jpmml.rexp.RVector.getValue(RVector.java:104)
at org.jpmml.rexp.RVector.getValue(RVector.java:80)
at org.jpmml.rexp.IForestConverter.encodeSchema(IForestConverter.java:59)
at org.jpmml.rexp.ModelConverter.encodePMML(ModelConverter.java:74)
at org.jpmml.rexp.ModelConverter.encodePMML(ModelConverter.java:70)
at org.jpmml.rexp.Main.run(Main.java:149)
at org.jpmml.rexp.Main.main(Main.java:97)

Exception in thread "main" java.lang.IllegalArgumentException: xcols
at org.jpmml.rexp.RVector.getValue(RVector.java:104)
at org.jpmml.rexp.RVector.getValue(RVector.java:80)
at org.jpmml.rexp.IForestConverter.encodeSchema(IForestConverter.java:59)
at org.jpmml.rexp.ModelConverter.encodePMML(ModelConverter.java:74)
at org.jpmml.rexp.ModelConverter.encodePMML(ModelConverter.java:70)
at org.jpmml.rexp.Main.run(Main.java:149)
at org.jpmml.rexp.Main.main(Main.java:97)
Error in .convert(tempfile, file, converter, converter_classpath, verbose) :
1