Trying to get property of non-object search► skip error►

File: .../Transliteration/TransliterationGrid.php:262

252:            /** @var ActiveRow $activeRow */
253:            foreach ($dataSource as $activeRow)
254:            {
255:                $lines = $this->lineRepository->getAllLinesForTransliteration($activeRow->getPrimary());
256:                $chapterLines = [];
257:                foreach ($lines as $line)
258:                {
259:                    $chapterLines[$line->object_type][$line->surface_type][] = array('transliteration' => $line->transliteration, 'line_number' => $line->line_number);
260:                }
261:                $exportData[] = [
262:                    'bookName' => $activeRow->ref('id_book')->book_abrev,
263:                    'chapter' => $activeRow->chapter,
264:                    'transliterationData' => $chapterLines
265:                ];
266:            }

1. .../Transliteration/TransliterationGrid.php:192 source  App\AdminModule\Components\TransliterationGrid->exportData(arguments)

   182:    
   183:            $this->addAction('delete', 'delete', 'deleteTransliteration!', ['id' => TransliterationRepository::COLUMN_ID])
   184:                ->setConfirm('Do you really want to delete transliteration?')
   185:                ->setTitle('Delete')
   186:                ->setClass('btn btn-xs btn-danger ajax');
   187:    
   188:            $this->addExportCallback(
   189:                'Export dat',
   190:                function ($dataSource, $grid)
   191:                {
   192:                    $this->exportData($dataSource, $grid);
   193:                },
   194:                TRUE);
   195:        }
   196:    
   

   $dataSource	Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/vendor/tracy/tracy/src/Tracy/Dumper.php on line 343