preprocessing problem


I am trying to conduct preprocessing analysis for my new dataset. The workflow I have was working great with my previous dataset but now for this new one, I am getting error messages. I am attaching the workflow along with the error I got and sample data and would be glad if you can help me to figure out what the problem is. I really appreciate your help in advance!

preprocessing for LIWC.knwf (35.2 KB)

sample data.xlsx (43.5 KB)

I have seen such problems before. You could try to do a clean start of KNIME once.

KNIME start with -clean option in knime.ini

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I’m not getting a error when I execute your workflow with the data provided. It seems like this is a syntax error, but I can’t tell what your expression is based on the screenshot. Is it just


or something else?