It might not be working due to an missing values as per the article
SAP HANA Predictive Analysis Library (PAL) - SAP Library
If you check on PMML value of 1 its a tree model which needs to be exported in a row.
This is causing issues. Try using 2 instead of 1. It might work.
Alternatively, what are you trying achieve by a tree depiction so PMML =0 is a good enough option.