Segmentation fault when initializing a 2d array inside function and using strcpy on it

Question

I want the textfiles array emptied after each function call so initialized it inside the function but im now getting a segmentation fault. Ive looked at other questions regarding this problem but couldnt find what i was looking for.

void orphantags(char tags[SIZE1][SIZE2],char files [SIZE1][SIZE2],char orph[SIZE1][SIZE2])
        {
         char textfiles[100][1000];
         int i,j,k=0;
         for(i=0;i<SIZE1;i++)
        {
         if(strncmp(getFileExtension(files[i]),"txt",3)==0)
         {
        strcpy(textfiles[k],files[i]);
        k++;
    }
   }
     k=0;
     for(i=0;i<SIZE1;i++)
      {
        for(j=0;j<SIZE1;j++)
        {
          if(strcmp(tags[i],textfiles[j])!=0)
           {
            strcpy(orph[k],tags[i]);
            k++;
           }
        
     }
}
}