Really, like changing hyphenated values like 5-1, that should be character, into dates, and stripping leading zeros that are part of things like account numbers. Please describe the exact problems you have been having with importing CSV files. One important consideration is that Proc Import only...
The previous eval step (5th evaluate click if I recall correctly) created the #NUM that is causing failure. On the steps leading up to the failure it's performing the other steps for false false false true false false etc., then converting those later to the steps saying: =IFERROR(INDEX...