cannot open .out file

I am new to CCS, and I tried to write a simple hello world 

#include <stdio.h>

void main(void) {
printf("Hello World!\n");
}

but when I start debugging it , an error appears. It said "Encountered a problem loading file: D:\test\helloworld\debug\helloworld.out Could not open file.

I figured out if I didn't write printf in main there was a .out file in debug folder and I also tried that if I used functions like fprintf and fopen, the .out file will disappear.

how to deal with this problem?