Thread: Assertion Failure

I'm using Microsoft Visual Studio 2005 for Windows XP.

I have my program compiling, but when I run it I get 2 errors from the
Microsoft Visual C++ Dbug Library in the microsoft file isctype.c. Both errors are the same - Expression: (unsigned)(c + 1) <= 256. The errors occur on the following lines where _ASSERTE occurs in isctype.c:

Code:

#if defined (_DEBUG)
extern "C" int __cdecl _chvalidator(
        int c,
        int mask
        )
{
        _ASSERTE((unsigned)(c + 1) <= 256);
        return _chvalidator_l(NULL, c, mask);
}

extern "C" int __cdecl _chvalidator_l(
        _locale_t plocinfo,
        int c,
        int mask
        )
{
    _LocaleUpdate _loc_update(plocinfo);

    _ASSERTE((unsigned)(c + 1) <= 256);
    if (c >= -1 && c <= 255)
    {
        return (_loc_update.GetLocaleT()->locinfo->pctype[c] & mask);
    }
    else
    {
        return (_loc_update.GetLocaleT()->locinfo->pctype[-1] & mask);
    }
}

Thanks for getting back to me. Here is the code that's causing the error:

Code:

#include <stdio.h>
#include <conio.h>
#include "molecule.h"
#include "smiles.h"
#include "smierr.h"

main( int argc, char *argv[] )
{
   char buf[200];
   char s[MAX_SMI];
   char sf[MAX_SMI];
   int Error, ErCode;
   int N_Frag, Found;
   MOLECULE m;
   RINGS r;
   long id;
   FILE *ff, *fs, *fo;

   if ( argc != 4 ) {
      printf( "USAGE: fragment <smiles-file> <fragment-file> <output-file>\n" );     
	  exit( 1 );
   }
   
   if ( (fs = fopen( argv[1], "r" )) == NULL ) {
      printf( "Unable to open SMILES file %s\n", argv[1] );
      exit( 1 );
   }
   if ( (ff = fopen( argv[2], "r" )) == NULL ) {
      printf( "Unable to open FRAGMENT file %s\n", argv[2] );
      exit( 1 );
   }
   if ( (fo = fopen( argv[3], "w" )) == NULL ) {
      printf( "Unable to open OUTPUT file %s\n", argv[3] );
      exit( 1 );
   }

   printf( " Processed: " );
   fgets( buf, 200, fs );      /* Retrieve line from smiles file */
   
   sscanf( buf, "%ld %s", &id, s);
   while ( !feof( fs ) ) {     
	   if ( (Error = InSmi( s, &m, &ErCode, 0 )) != 0 ) {
         printf( "SMILES ERROR for %ld", id );
         getch();
      } else if ( (Error = ChkVal( &m )) != 0 ) {
         printf("VALENCE ERROR for %ld", id );
         getch();
      } else {
	 FindRings(&m,&r);
         Found = 0;
         fscanf( ff, "%s", sf );
         while ( (!feof( ff )) && !Found ) {
	    N_Frag = EV_Num( sf, &m, &r );
            if ( N_Frag > 0 ) {
               fprintf( fo, "%10ld|%s\n", id, s );
               Found = 1;
            } else if ( N_Frag < 0 ) {
               printf( "FRAGMENT ERROR\n" );
               exit( 1 );
            }
            fscanf( ff, "%s", sf );
         }
         rewind( ff );
      }
      printf( "Processing %7ld\n", id );
      fgets( buf, 200, fs );      /* Retrieve line from smiles file */
      sscanf( buf, "%ld %s", &id, s);

   }
   fclose( fs );
   fclose( ff );
   fclose( fo );
  
   exit( 0 );
}

Thanks Salem, that gets me going in the right direction.