Message <Context> this argument to <function name> contains a bad conversion specification "<incorrect conversion>" that will cause unpredictable behavior. Description The compiler has detected an illformed conversion specification (flags, width, precision, length modifier) or an unknown conversion specifier (not diouxefgcspn...) that will cause unpredictable behavior. This might not have been what you intended. User Action Review the documentation for this function and modify the conversion specification as appropriate.