You can use forward slash for both system or use the DIRECTORY_SEPARATOR constant.
– VitalyJul 25 '13 at 05:48
@user2431202, any error message? @Vitaly Actually `DIRECTORY_SEPARATOR` is provided for path parsing purposes, it is completely unnessesary to use it to read or exec a file, so just always use `/`
– Jul 25 '13 at 06:43