Hi,
I've 16 yrs experiance in Data processing & Validation, this is just like validation, I've done this type work a lot, e.g. we are running the program on data files and generate the error logs, we are viewing the errors and correct into the original data file, after completing the we are again run to see if there are any error missed out. Its a same project like that, Don't worry will complete this project with a time with good quality.