Importation of a matlab function into KNIME


As a part of my study, I would like to import a matlab function for signal processing into a KNIME Node, I tried to do it follow the example with l : Create a New KNIME Extension: Quickstart Guide. When I tried to import the node that i created in the KNIME workflow, a library error occure.
Do u have other ideas or suggestions for this error or a way to import this function easily without using any snippet ? I really would like to create a robust node.

Thanks a lot.
Best regards.

Please don’t make duplicate posts. I am unlisting this one and keeping the one in the developer section: