I've experienced this error qhen i'm usting the node sygma metabolites.
Execute failed: org.knime.python2.kernel.PythonKernel.execute(Ljava/lang/String;Lorg/knime/core/node/ExecutionContext;)[Ljava/lang/String;
I think this is related to the python wrapper since when I try to use a python snippet (using the same script of the sygma node) everything goes ok.