You can do this with a hot folder script that counts the characters of a field in the incoming csv $FFin$ and then writes to a new csv with an extra field for the character count of that field. The script then submits the new csv to $FFout$. You also need to map the new field in the MAX Setup.
Using MAX to feed a workflow. I have a requirement however to generate a different barcode based on the length (count of charcters) of one of the fields. The conditions available in routing for the MAX fields however are limited to the content it seems (Starts with, Ends with, Contains), but nothing to qualify the length.
Is there a way to determine the length of a field and route accordingly solely based on the content?