Check50 failing my recover code on time out while waiting for program to exit fault

Question

I have been on this problem all day but I cannot seem to discover what is wrong with my code and why it won't pass on check 50. If I try to make changes I would get a segmentation fault and I cannot seem to figure out what I am missing. I have checked filename at initialization and it has sufficient memory for 8 char characters. I am lost on this one.

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        printf("Usage: ./recover filename.exe\n");
        return 1;
    }
    FILE *file = fopen(argv[1], "r");
    if (file == NULL)
    {
        printf("Error: cannot open file\n");
        return 2;
    }
    typedef uint8_t BYTE;
    int counter = 0;
    char Filename[8];
    FILE *output = NULL;

    BYTE buffer[512] = {0};

    while(fread(buffer, 512, 1, file) == 1)
    {
        if(buffer[0] == 0xff || buffer[1] == 0xd8 || buffer[2] == 0xff || (buffer[3] & 0xf0) == 0xe0 || feof(file) == 0)
        {
            if(output != NULL)
            {
                fclose(output);
                sprintf(Filename,"%03i.jpg", counter);
                output = fopen(Filename, "w");
                fwrite(buffer, 512, 1, output);
                counter++;
            }
            else
            {
                sprintf(Filename,"%03i.jpg", counter);
                output = fopen(Filename, "w");
                fwrite(buffer, 512, 1, output);
                counter++;
            }
        }
        if(output != NULL)
        {
            fwrite(buffer, 512, 1, output);
        }
    }
    fclose(output);
    fclose(file);
    return 0;
}