copyItemAtPath:toPath:error: is returning NO

Question

The chapter I'm reading is talking about NSFileManager, and the author said to create an empty file called testFile. The testFile is under the same folder as main.m. I didn't create newfile. I'm not able to copy testFile, and it's returning 2 and a NSLog saying @"couldnt copy file". I tried to put the argument for toPath: as @"/Users/el/Desktop/prog/prog/newfile"

int main (int argc, char *argv[]) {
    @autoreleasepool {
        NSString *fName = @"/Users/el/Desktop/prog/prog/testFile";
        NSFileManager *fm = [NSFileManager defaultManager];

        if ([fm fileExistsAtPath: fName] == NO) {
            NSLog(@"couldnt find file");
            return 1;
        }

        if ([fm copyItemAtPath:fName toPath:@"newfile" error:NULL] == NO) {
            NSLog(@"couldnt copy file");
            return 2;
        }

Answer 1

The second path must be also absolute.

[fm copyItemAtPath: @"/Users/el/Desktop/prog/prog/testFile" toPath: @"/Users/el/Desktop/prog/prog/newFile" error: NULL];

Note: You should use the NSURL-based methods instead of the NSString-based ones.