Problem: DLL using fclose doesn't close file unless exit Labview completly

Question

Hello,
Do I have more than one option to do this correctly? I do not want to be forced to stop and start
my Labview application every time I want to close a file.
    Thank you,
    Christopher Lusardi

Answer 1

LabView is calling the DLL from a Call Function Node.
The DLL is a copy of the below code. Is there anything wrong with this code?
Christopher Lusardi
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
char file [100];
#include "my_header.h"
int create_file ()
  char Location [100] = "my_files/";
  FILE *Fptr;
  char box [50];
  int numalo = 0;
  int numdalo = 0;
  int mypid;
  int element;
  if ( gethostname (box, 50) < 0 )
    printf ("gethostname failed\n");
    return (-1);
  mypid = (int)getpid ();
  sprintf (file,"%s%s_%d",Location,box,m­ypid);
  if ( (Fptr = fopen (file,"w+")) == NULL )
    printf ("fopen () failed opening file = %s\n",file);
    return (-1);
  else
    fprinttf (Fptr,"%d\n",Number_of_items);
    fprinttf (Fptr,"^^^^^^^^^^^^^^^^^^^^^^^­^^^\n");
    for (element = 0; element < Number_of_items;element++)
      if ( vegetable [element] == 1024 )
        fprintf (Fptr,"%d %d %X %d %d %X %X %X\n",
          vegetable [element],
          fruit,
          filtered_water.tomato [element],
          filtered_water.green [element],
          filtered_water.bacteria [element],
          filtered_water.organic [element],
          filtered_water.raw [element],
          filtered_water.washed [element]);
      else
        fprintf (Fptr,"%d %d %X %d %d %d %X %X\n",
          vegetable [element],
          fruit,
          filtered_water.tomato [element],
          filtered_water.green [element],
          filtered_water.bacteria [element],
          filtered_water.organic [element],
          filtered_water.raw [element],
          filtered_water.washed [element]);
  fclose (Fptr);
  return (0);
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