error while setting an assignment

[prithvirajmohanty]

Warning: require_once(C:\Moodle281\server\moodleC:\Moodle281\server\moodle/lib/pear): failed to open stream: Invalid argument in C:\Moodle281\server\moodle\plagiarism\moss\lib.php on line 37

Fatal error: require_once(): Failed opening required 'C:\Moodle281\server\moodleC:\Moodle281\server\moodle/lib/pear' (include_path='C:\Moodle281\server\moodle/lib/zend;C:\Moodle281\server\moodle/lib/pear;.;C:\Moodle281\server\php\PEAR') in C:\Moodle281\server\moodle\plagiarism\moss\lib.php on line 37