- check the application to find the cause of the concern from the user regarding the generated text file
- An error is encountered when debugged the application, fix the encountered error to continue fixing the concern from the user 
- The error has been fixed, continue to debug the application to find the cause of the error
- as per checking, the cause of the concern is that the transaction number if the value is null it will view a blank field
- modify the application to add a condition, if the transaction number is null it will display zero in the text file
- test the modified application for a date with and without sales for checking if the changes take effect and if the generation of data is not affected
- as per checking, all of the data is OK
- send the exe to sir Ian for checking on his side