I Know how to use LSMW and upload data . Now I am trying to upload data for xk01 uisng lsmw. SO, the problem is vendor number uses internal assignment here. I don't know wether we use lsmw if lifnr uses internal assignment.Also I need to upload bank details for each vendor which are in a seperate flat file. Guys with real time experience, I think can solve this problem. Please guide me with this.