debug assertion failed!

Hi experts,

i am facing this error in runtime

debug assertion failed!
FILE fgets.c
line 60
Expression str!= NULL







my code is pasted below can anyone help me?

Code:

/* Include files */
#include <stdio.h>
#include <uf.h>

#include<stdio.h>
#include<conio.h>
#include<uf.h>
#include<uf_csys.h>
#include<uf_ui.h>
#include<uf_curve.h>
#include<uf_vec.h>
#include<uf_part.h>
#include<uf_drf.h>
#include<string.h>
#include<stdlib.h>
#include<uf_defs.h>

#include <ERRNO.H>
#include <direct.h>
#include <math.h>
#include <io.h>
#include <stdarg.h>
#include <time.h>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <sys/stat.h>
#include <assert.h>


static void my_block();
extern void main( char argc, char *argv[] )
{
   my_block();
	
   
}

static void my_block()
{


	FILE *fp;
	float x,y,z;
	long int i=0,n=0,j=0,k=0;
	char buf1[1000];
	double x_cor[5];
	double y_cor[5];
	double z_cor[5];
	const char  *str1;
	tag_t  part;
		struct point{

		double pt[3];
	};

	int no_of_section,no_points,count=0;
	int	degree=3;
	int	periodicity=0;
	int	save_def_data = 0;
	int num_points=5;
	struct point tempPts;
	tag_t	spline_tag=NULL_TAG;

	
	UF_CURVE_pt_slope_crvatr_t point_data[5];

	//buf1 = (char *)malloc (sizeof(char*));

	fp = fopen("D:\\Backup_QI-287\\GEConfidential\\rajesh\\material_code_table\\javed\\Runner_Blade.txt", "r");
	
//(fgets(line, 80, fr) != NULL)

	
	
	while (((str1 = fgets( buf1, 1000, fp ))!= NULL)&&(k != EOF ))
	{		
										
			i = strlen(buf1);
			//printf("\n Final val : &#37;d",i);
		
			
				if(n==1)
				{
					sscanf(str1,"%d %d",&no_of_section,&no_points);
					printf("\n No of Section: %d\n",no_of_section);
					printf("\n No Points: %d\n",no_points);
				}
			
			   if(n>1)
				{
					
					sscanf(str1,"%f %f %f",&x,&y,&z);
					//printf("\n Final val : %.3f %.3f %.3f",x, y, z);
					
					tempPts.pt[0]=x;
					tempPts.pt[1]=y;
					tempPts.pt[2]=z;
						
					j++;
					printf("\n Final val : %.3f %.3f %.3f",tempPts.pt[0],tempPts.pt[1],tempPts.pt[1]);
			
					printf("\n no of line :%d",j);
					

				}
						
				n++;

	}
	fclose(fp);

/*
	UF_PART_new("D:\\Pract\\shspline\\d5.prt",1,&part);
	UF_CURVE_create_spline_thru_pts ( degree,  periodicity, num_points, point_data,  NULL,  save_def_data, &spline_tag );

	UF_PART_save(  );*/
	

	printf("\nhi i m in block\n");


}

yeeeeaaahh... I think you got the wrong file.

http://faq.cprogramming.com/cgi-bin/...&id=1043284376

It seems someone has been cutting and pasting with no idea what's going on

I'd do a search for a line that has assert( ...
But since you say it's on line 60 of fgets.c, I'm assuming it's coming from the fgets() function rather than your own code...
Maybe you should check the value of fp after calling fopen() to see if it actually opened the file...

> debug assertion failed!
> FILE fgets.c
> line 60
> Expression str!= NULL
As cpjust has correctly diagnosed, this is telling you that you passed a NULL pointer to fgets(). Since buff1 obviously isn't going to be NULL, and fp is in all likelihood NULL (following a failed fopen), then that would be the problem.