Getting error with DOMPDF on Codeigniter 2 + dompdf-0.5.2

[eluser]Unknown[/eluser]
@Riley123

Warning: require_once(/Applications/MAMP/htdocs/extranet/application/helpers/dompdf/include/ci_exceptions.cls.php) [function.require-once]: failed to open stream: No such file or directory in /Applications/MAMP/htdocs/extranet/application/helpers/dompdf/dompdf_config.inc.php on line 208

Fatal error: require_once() [function.require]: Failed opening required ‘/Applications/MAMP/htdocs/extranet/application/helpers/dompdf/include/ci_exceptions.cls.php’ (include_path=’.:/Applications/MAMP/bin/php/php5.3.6/lib/php’) in /Applications/MAMP/htdocs/extranet/application/helpers/dompdf/dompdf_config.inc.php on line 208


I have solved this problem by creating ci_exceptions.cls.php,an empty php file in that directory and i am not getting errors anymore.I dont know whether it is right way bt it is working well and not showing errors now