Went to the ATM to get some cash.. entered an amount of 800 INR and to my surprise got an error saying "Your account does not have sufficient funds for this transaction" .. Instantly thought that my account has somehow been compromised.. checked the bank app and found out that I everything was normal..

As it turns out the ATM machine did not have 500 or 100 INR notes, thus it could not dispense my requested amount..

Now that's what we call a "Good" error handling..