function sanityCheck()
{
//make sure num location tiers is the same on the right vs. the left
$_app = new ITechTable(SyncCompare::getDesktopConnectionParams('location', $this->desktopFilePath));
$tiers = $_app->getAdapter()->query('SELECT COUNT(DISTINCT tier) as "cnt" FROM location');
$rows = $tiers->fetchAll();
$settings = System::getAll();
$city_tier = 2 + $settings['display_region_i'] + $settings['display_region_h'] + $settings['display_region_g'] + $settings['display_region_f'] + $settings['display_region_e'] + $settings['display_region_d'] + $settings['display_region_c'] + $settings['display_region_b'];
if ($rows[0]['cnt'] != $city_tier) {
return 'Could not import data: Offline database contains ' . $rows[0]['cnt'] . ' regional levels, while the web database contains ' . $city_tier . '.';
}
return false;
}