Take 7 on last

diff --git a/src/executables/ArcTool.php b/src/executables/ArcTool.php
index 4a3f5dc09..b0b0c71d5 100755
--- a/src/executables/ArcTool.php
+++ b/src/executables/ArcTool.php
@@ -410,7 +410,7 @@ class ArcTool extends DictionaryUpdater implements CrawlConstants
                 echo "RECORD: $i\n";
                 echo "PARTITION: {$record['PARTITION']}\n";
                 echo "NUMBER OF DOCS: {$record['NUM_DOCS']}\n\n";
-                if ($this->archive_info['VERSION'] < "3.2") {
+                if ($index->archive_info['VERSION'] < "3.2") {
                     $postings_offset = (empty($record['POSTINGS'])) ?
                         -1: $record['POSTINGS'];
                     $postings_len = (empty($record['LAST_BLOB_LEN'])) ?