@mcrisnidh you might want to check the setup of the loop. In the past what sometimes helped was wrapping the thing happening within a loop in a component or meta node.
@joshuash beside what @Thyme is saying these things come to my mind:
(especially) with nested loops it can make sense to use Metanodes in order to make sure what part of the loop will do what and how they are wired. You can check „select sope“ by right clicking on the Loop node and see how KNIME would interpret the wiring.
it might very well be necessary to check the logic behind the loop and if it would work in every constellation. It might be necessary to provide a dummy table of the same st…
Also:
@pnotova you will have to make sure all the loops are correctly wired. You can select one loop’s current focus with right click. Sometimes it can make sense to put a Cache node in fron of the loop. Also there have been cases where it was best to encapsulate the inner content of a loop in a component in order to make sure what to execute when if you have nested loops.
On performance and KNIME in general I can offer this article:
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