I tried to list files and use ExecuteStreamCommand processor to convert file and store into same directory but it dsn't work for me I tried to upload the picture here but it shows some error so i explain wih commands -First i use ListFile process and use to properties like Input Directory: D:/Nifi_Test (installed Windows NiFi) Input Directory Location: Local File Filter: *.xls -Second i use ExecuteStreamCommand process and use properties like I stored your python script like script.py in my local directory like C:\script.py Command Path:C:\script.py Command Arguments: empty I'm having book1.xls file in D:/Nifi_Test but it doesn't list in ListFile process please heip me to out this... ... View more