ISS Debugging Problem

Hi all,

I'm a newbie with NIOS II IDE development. I have a strange problem during debugging of the following simple code with the following System Properties:

"Program never exist" Turned ON

"Small C Library" Turned ON

each other checkbox is deactivated.

OnChip Memory for all memory Types. No kind of RTOS implemented. Stdout, stderr, stdin set to JTAG

# include <stddef.h># include <stdio.h># include <sys/alt_irq.h># include <sys/alt_alarm.h># include "alt_types.h"

alt_u32 my_alarm_callback (void* context)

{

printf ("Timer Callback");

return alt_ticks_per_second();

}

int main()

{

static alt_alarm alarm;

printf("Hello from Nios II!\n");

printf("Init Timer\n");

if (alt_sysclk_init (1) < 0)

printf ("No system clock available\n");

if (alt_alarm_start (&alarm,alt_ticks_per_second(),my_alarm_callback,NULL) < 0)

printf ("No system clock available\n");

return 0;

}

When I start a debug session I come to the first printf command, stepping over I come to the next printf command. When I try now, to step over this printf command, the IDE jumps to the alt_alarm.h file, in a row where no commands are written. I have never seen a such behavior.

Anyone knows what could cause this strange behavior?

Thx