I had the security review module installed but removed it. Thought that doing so would solve this problem when trying to upgrade drupal from 7.23 to 7.24:
"require_once(__DIR__/security_review.inc): failed to open stream: No [warning] such file or directory security_review.drush.inc:9 Drush command terminated abnormally due to an unrecoverable error. [error] Error: require_once(): Failed opening required '__DIR__/security_review.inc' (include_path='.:/usr/lib64/php:/usr/share/pear') in /home3/tonymacc/public_html/drupal/sites/all/modules/security_review/security_review.drush.inc,"
?
Thanks Tony