Do you really have the word "NULL" in ther or is it blank? If Blank:
New_Credit_dt = IF(NOT(ISBLANK([Fun_dt])) && BLANK([Denial_Date]),[Credit_dt],BLANK())
Do you really have the word "NULL" in ther or is it blank? If Blank:
New_Credit_dt = IF(NOT(ISBLANK([Fun_dt])) && BLANK([Denial_Date]),[Credit_dt],BLANK())