WHY , THIS ERROR: Error[Pe109]: expression preceding parentheses of apparent call must have (pointer-to-) function type F:\Documents and Settings\Juan Pedro\Escritorio\renuevo\netapp.c 196

 Hi Juan Pedro, please write a more precise title to your request and not so long.

user3889415 said:

no working, only working if args = (ptr + 9);  

 This assign a constant value summed to and has no problem

user3889415 said:

args = (ptr + HEADERS_SIZE_CMD);

 This is invoking a macro or string substitution require some parameter, this case, as compiler ask you some parameter are to be supplied.

 Search for macro usage to see how it work, it is unrelated to MSP, is a pure C error.

Take "HEADERS_SIZE_CMD" and replace it with _all_ the text (until end of line) after "#define HEADERS_SIZE_CMD "
This is what the precompiler does. and the result is what the compiler sees - and complains about (rightfully):
args = (ptr + 9 , (SPI_HEADER_SIZE + SIMPLE_LINK_HCI_CMND_HEADER_SIZE ) ,(5+4) );
It would work for a function call
func(ptr+ HEADERS_SIZE_CMD);
if func() takes three parameters. But it won't work for an assignment.

you could also do
#define ARGS (ptr + HEADERS_SIZE_COMMAND)
and then do
func(ARGS);
because ARGS will be replaced by its definition, and inside this definition, HEADERS_SIZE_COMMAND will be replaced by its definition, and inside it, SPI_HEADER_SIZE etc. will be replaced by its definition. All done before the resulting text is fed into the compiler.
(btw: #include is also just replaced by the text content of the named file, as if it had been copy&paste in there.)