[Sahana_proj] Fatal error in DocBuilder

[Canning, Mark D. (2008)]

any time i try to run phpdoc on my mysql assignment it returns this:
Fatal error:  Allowed memory size of 8388608 bytes exhausted (tried to allocate 23040 bytes) in /home3/mcanning/public_html/PhpDocumentor-1.3.1/PhpDocumentor-1.3.1/phpDocumentor/Smarty-2.6.0/libs/Smarty.class.php on line 677

Does anyone know what i can do about this?