Standard stdout through JTAG

I thought it is not necessary to open a new thread because this post is problem-related.

To configure my bsp file system:

• At the BSP Editor, I enabled the hostfs, leaving the /mnt/host as the default and clicked at the generate button

• After this, I right-clicked my bsp project, went to the Nios option, and perfomed the generate/compile (I don´t remember exactly) command

• And, finnaly I compiled my code with success

My problem: my simple example-program only runs in debug, i.e., using step-over I can run the program until its end. It is also possible to see the myfile.txt at my /software/my_proj directory

But, running directly, it freezes after the "before open" message. During the execution or after aborting it, I can´t see any myfile.txt in the directory previously mentioned.

My .c code is:

# include <stdio.h>
# include <string.h>
int main()
{
   char *msg = "hello to file";
   FILE *fp;
   printf("before fopen...\n"); /* it freezes here */
   fp = fopen("/mnt/host/myfile.txt", "w");
   printf("after fopen\n");
   if(fp != NULL){
      printf("inside if...\n");
    
      fprintf(fp, "%s", msg);
      fclose(fp);
    
      printf("file closed\n");
   }
   else printf("Error during opening file\n");
   printf("Hello from JTAG CONSOLE Nios II!\n");
  return 0;
}

any tip why i only can run via debug and can´t run directly?