List.Combine + List.Join behave oddly - bug?



in the attached file, I try to join sublists. Strangely, it only works, if I click the plus button on the List.Join node and then the minus button.


Any ideas? Is the mistake with me or is this a bug?

… I have installed …


Best regards,








When List.Combine has 2 list input nodes (list1,list2) the combinator (in your case List.Join) should also have a corresponding number (2) of empty input nodes.

I suspect your definition will work consistently (without you having to toggle +/-) if the List.Join node is as below.