Hi, not sure if it's a bug, but looks at least like some inconsistency: <hansl> eval regsub("ha", "a", "\n") # works eval regsub("ha", "a", sprintf("\"")) # works eval regsub("ha", "a", "\"") # fails </hansl> I know that plain literal strings in gretl aren't made for escape sequences, but the regsub doc says that the last arguments are interpreted as regular expressions, so I thought the \" would work. The \n works here, too. thanks sven