Column expressions adds a "(#1)" to each column name

Hi there @ThomasJ,

welcome to KNIME Community!

How about using String Manipulation (Multi Column) node if you are performing same manipulation over multiple columns?

Have couple of ideas what could be wrong in your current design but it would be best if you share workflow to avoid unnecessary guessing if you are interested to find that out :wink: See here how to do that:

Br,
Ivan