Dear Satyam,
If you are doing what has been mention in my blog,then this issue will come because there is a mismatch between the sl. no defined in BADI and the file your are trying to load.further you have close the file with i.e.start with XX....end with YY in the data rows.
Please check with your developer he has take care of the columan numbers of excel sheet and BADI code.
regards
shankar