* line 29 of /theme/boost_union/classes/cache/loader.php: Error thrown
* line 217 of /lib/classes/component.php: call to include_once()
* line ? of unknownfile: call to core\component::classloader()
* line 472 of /cache/classes/definition.php: call to class_exists()
* line 581 of /cache/classes/helper.php: call to core_cache\definition::load()
* line 540 of /cache/classes/helper.php: call to core_cache\helper::purge_store()
* line 1930 of /lib/upgradelib.php: call to core_cache\helper::purge_all()
* line 719 of /admin/index.php: call to upgrade_noncore()
