RL-RTX can not work with RL-FlashFs

First thanks to try to answer to my question
To Per Westermark : I'am not sure to understand what do you really mean. That's not I never get out of the main function, it's I never go in the main function. So I never go to the rest of my program which for the moment is very "light" because I have just an init task which launch a task that switch the led of my demo board.

__task void led (void) {

  LED_Init (); /* Initialize LED display module    */
  for (;;) {
    LED_Out (leds);/* Update LED Driver  */
        leds=leds<<1;
        if(leds==0x10)
                leds=0x01;
    os_dly_wait (20);
  }
}

__task void init (void) {

        static FILE *f = NULL;

        if (finit() == 0) {
        f = fopen ("M:\\toto.txt","w");

        if(f!=NULL)
                fclose(f);
        }
  /* start task led */
  t_led    = os_tsk_create (led, 1);
  os_tsk_delete_self ();
}


int main (void) {

os_sys_init (init);
/* Initialize RTX and start init    */
}

To John Linq :
I have

#ifndef OS_STKCHECK
 #define OS_STKCHECK    1
#endif

but I check I never get into

os_stk_overflow (OS_TID task_id)

So I think there is no stack overflow (and moreover it is a really small program).

next you are right I should do

os_sys_init (init);

before doing everything else so I put the "FlashFS" call in the init task (like I post). but that don't change anything.

When I launch the program in debug mode I found that I go to

void _sys_exit (int return_code) {
   /* Endless loop. */
   while (1);
}

and of course I stay in it because it's a "while(1)" that why I never go to main, I go to _sys_exit before the main function is call

First thanks to try to answer to my question
To Per Westermark : I'am not sure to understand what do you really mean. That's not I never get out of the main function, it's I never go in the main function. So I never go to the rest of my program which for the moment is very "light" because I have just an init task which launch a task that switch the led of my demo board.

__task void led (void) {

  LED_Init (); /* Initialize LED display module    */
  for (;;) {
    LED_Out (leds);/* Update LED Driver  */
        leds=leds<<1;
        if(leds==0x10)
                leds=0x01;
    os_dly_wait (20);
  }
}

__task void init (void) {

        static FILE *f = NULL;

        if (finit() == 0) {
        f = fopen ("M:\\toto.txt","w");

        if(f!=NULL)
                fclose(f);
        }
  /* start task led */
  t_led    = os_tsk_create (led, 1);
  os_tsk_delete_self ();
}


int main (void) {

os_sys_init (init);
/* Initialize RTX and start init    */
}

To John Linq :
I have

#ifndef OS_STKCHECK
 #define OS_STKCHECK    1
#endif

but I check I never get into

os_stk_overflow (OS_TID task_id)

So I think there is no stack overflow (and moreover it is a really small program).

next you are right I should do

os_sys_init (init);

before doing everything else so I put the "FlashFS" call in the init task (like I post). but that don't change anything.

When I launch the program in debug mode I found that I go to

void _sys_exit (int return_code) {
   /* Endless loop. */
   while (1);
}

and of course I stay in it because it's a "while(1)" that why I never go to main, I go to _sys_exit before the main function is call

Does the flash file system requires dynamic memory? In that case - have you supplied a large-enough heap?

yes it does. Keil report that you must define at least 0x400 bytes of heap.

Thanks a lot!!
I forgot to set the heap size (it was 0x00) and now it seams to work well!!

Thank you all.