//read model type from modelF
fi = fopen(argv[2], "r");
if (fi == NULL) { fprintf(stderr, "Cannot open %s! It may not exist.\n", argv[2]); exit(-1); }
//read model type from modelF
fi = fopen(argv[2], "r");
if (fi == NULL) { fprintf(stderr, "Cannot open %s! It may not exist.\n", argv[2]); exit(-1); }