CopyFile, file size

[cabledevin]

I seem to get an CopyFile error 3 with this code. FS means File Size (it checks file size)
fname2 and 3 are both strings.

	fname2 = path + "\\" + data.cFileName;
	fname3 = "L" + fname2.erase(0,1); 
	fname2 = "C" + fname2;
	if (FileExists(fname3) == false){
                CopyFile(fname2.c_str(),fname3.c_str(),0);
                }
	else {
		if (FS(fname3) < FS(fname2)) {
                        CopyFile(fname2.c_str(),fname3.c_str(),0);
                        }
                }