In regression, select input columns using a list

Hi Folks,

Trying to understand how to dynamically select the input columns in the predictive tool. Everytime the workflow runs, the target variable will be the same so I can just select that. On each run, the columns I want to use will constantly be changing. I have the list of column name to use being read in each time (in a column called ‘var’). I’m trying to convert this to a variable to pass to the learner so it strictly only uses columns in that list. So far no joy. Any ideas on how to achieve this?

Thanks