I need to change plenty files in just one try.

[mlauber71]

@lezp you might want to take a look at this collection

A meta collection about Loops, Switches, Paths and Flow Variables in KNIME...

Basic articles about loops

How to include file CSV Writer in a loop?

Hi @braunnz and welcome to the KNIME community forum, You can find your answer here (and learn more about loops in KNIME): https://blog.statinfer.com/which-loop-is-the-right-one-for-me/ And here you can learn more about making use of flow variables in KNIME: https://blog.statinfer.com/knime-spirits-at-your-service/

Nodeguide Loops

Loops | KNIME

Lesson 4. Loops
https://www.knime.com/self-paced-course/l2-dw-knime-analytics-platform-for-data-wranglers-advanced/lesson4