Message <Context> the arguments to <function name> do not match the assertions of its format attribute. The format argument or the argument preceeding the first argument to check is missing. Description The format attribute of this function asserts that the format argument exists and will be checked if it is a string constant. The first argument to check, if non-zero, identifies the argument corresponding to the ellipsis in the function declaration and asserts that the argument preceeding it exists. User Action Modify either the function call or the format attribute so that they match.