[stinky_180]

first of all, what iphone model do you have?

was it previously jailbroken? if so, were the shsh blobs saved via cydia or tiny umbrella?

are you trying to flash a custom ipsw or stock ipsw? is the error going on when using a stock ipsw? if you using a custom ipsw, use tiny umbrella to kick the phone after getting the 1015 error.