I’m not finding the “Column Expressions” function and I’ve already selected the “all nodes” settings
It’s part of an extension. Make sure you have this installed 
You can drag and drop it into your KNIME
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Thanks!
What function would I use to create a column if it didn’t exist?
Depends on your use case. You need to click on the plus icon to add a new column, set the definitions and then create the function accordingly.
if (isMissing(column(“C170”))) {
“default_value_C170”
} else {
column(“C170”)
}
I’m trying this function but it returns error
Please share your workflow or an example that shows the problem. It works fine for me if I use the same function
In my case, the entire column doesn’t exist and I wanted to create it
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