WARN DBStats[2014-08-07 22:24:28] [da0e3] Failed to get data from API: Trying to add two strings in DataTable\Row::sumRowArray: '16 K' + '3600 K' for row # ['label' => -1, 'data_size' => '16 K', 'index_size' => '16 K', 'row_count' => 0, 'total_size' => '32 B'] [] [idsubtable = ]<br />#0 /var/www/piwik/core/DataTable/Row.php(566): Piwik\DataTable\Row->sumRowArray('16 K', '3600 K')#1 /var/www/piwik/core/DataTable/Row.php(535): Piwik\DataTable\Row->getColumnValuesMerged('sum', '16 K', '3600 K')#2 /var/www/piwik/core/DataTable/Filter/Truncate.php(105): Piwik\DataTable\Row->sumRow(Object(Piwik\DataTable\Row), false, false)#3 /var/www/piwik/core/DataTable/Filter/Truncate.php(72): Piwik\DataTable\Filter\Truncate->addSummaryRow(Object(Piwik\DataTable))#4 /var/www/piwik/core/DataTable.php(425): Piwik\DataTable\Filter\Truncate->filter(Object(Piwik\DataTable))#5 /var/www/piwik/core/API/DataTableGenericFilter.php(163): Piwik\DataTable->filter('Truncate', Array)#6 /var/www/piwik/core/API/DataTableGenericFilter.php(42): Piwik\API\DataTableGenericFilter->applyGenericFilters(Object(Piwik\DataTable))#7 /var/www/piwik/core/Plugin/Visualization.php(576): Piwik\API\DataTableGenericFilter->filter(Object(Piwik\DataTable))#8 /var/www/piwik/core/Plugin/Visualization.php(319): Piwik\Plugin\Visualization->applyGenericFilters()#9 /var/www/piwik/core/Plugin/Visualization.php(171): Piwik\Plugin\Visualization->applyFilters()#10 /var/www/piwik/core/Plugin/ViewDataTable.php(409): Piwik\Plugin\Visualization->buildView()#11 /var/www/piwik/core/Plugin/Report.php(287): Piwik\Plugin\ViewDataTable->render()#12 /var/www/piwik/core/Plugin/Controller.php(278): Piwik\Plugin\Report->render()#13 /var/www/piwik/plugins/DBStats/Controller.php(40): Piwik\Plugin\Controller->renderReport(Object(Piwik\Plugins\DBStats\Reports\GetReportDataSummary))#14 [internal function]: Piwik\Plugins\DBStats\Controller->index()#15 /var/www/piwik/core/FrontController.php(576): call_user_func_array(Array, Array)#16 /var/www/piwik/core/FrontController.php(86): Piwik\FrontController->doDispatch(NULL, NULL, NULL)#17 /var/www/piwik/core/dispatch.php(34): Piwik\FrontController->dispatch()#18 /var/www/piwik/index.php(47): require_once('/var/www/piwik/...')#19 {main}