Uset Java IF after a Loop Start

KNIME Analytics Platform
#1

Hi all,

  I'm using a Java IF node after a Loop Start. The condition of Java IF evaluates the currentColumnName variable that the Loop Start node generates.

  Sometimes this nodes are in a inactive branch and, so, the Loop Start output is inactive. But the Java IF node still try to evaluate the condition and throw a error like this:

  No such variable "currentColumnName" of type STRING

  This is because the currentColumnName doesn't exist when the Loop node is inactive.

  I would like to avoid the Java IF node evaluation when the branch is inactive, or any other solution to solve the problem.

  Thank you for your help.

      Andreu

#2

Hi Andreu,

Sorry for our silence and thanks for reporting this. We have fixed the problem. The fix will be available with KNIME v2.5.2

Regards,
  Bernd

#3

Hi Andreu,

not being a great java user, could you post a very simple yet educational example of implementation of a java if node in an exploration loop? I'm looking for things like do I need to declare something, how do I install the code etc..

 

thank you

B