Decision Tree to Image node error on NullPointerException

KNIME Analytics Platform
1

I imported some decision rules from SAP HANA PAL using the PMML Reader Node.  I connected it to ‘Decision Tree to Image’ node and now I am having a fatal execution error.

ERROR Decision Tree To Image              Execute failed: ("NullPointerException"): null

The decision tree rules should contain no null values, so how could this particular error message apply? Troubleshooting thus far:

  • - Modifying the configuration settings.  For example I tried alternating use of the NODE DISPLAY options (chart, table), but no benefit there.
  • - Searching the forum using the error message as search term… I am unable to find any related and actionable information.
  • - Examining the knime.log file, but it’s a bit beyond me… I have a lot of programming experience but not in Java.

I include zip file that contains the workflow folder [KNIME_tree_temp1], which includes the PMML input file that contains the decision rules [DT-temp - Copy (2).pmml].  Does anyone have a suggestion?

2

I am sorry, I also did not found a workaround. I suppose SAP HANA supports an Decision Tree Option with its PMML which the Decision Tree to Image node currently is not aware of.

I forwarded it to our bugtracking system and will keep you posted as soon as there are any news.

Best, Iris

3

Hi,

we just fixed this Bug with our newest Release 2.12.1

Best, Iris