Hlo Micheal, Just a quick question I have check the provided clean file and my clean file after running “preprocess”. Both are same. But if I run “breaches_per_month” on provided clean file, it gives me almost same output as someone sent in previous thread( which I know not 100% correct output as mentioned in that article) If I run the same script “ breaches_per_month” on my clean file, it gives different output. But logically the output should be same for both files as the both cleaned files have same content. Can you please clear my this confusion. If anyone else want to contribute, thanks in advance Thank you Raj