<p>The .bz2 file on the Geofabrik server does contain the relation you are looking for:</p>
<pre><code>$ bzgrep 'id="56389"' oberbayern-latest.osm.bz2
<relation id="56389" version="25" timestamp="2012-12-16T09:21:11Z" changeset="14290051" uid="130472" user="fx99">
</code></pre>
<p>It seems your download is faulty. Don't be confused by the negative IDs, they are created by osm2pgsql automatically from positive relation IDs in the downloaded file. Also, you should use the .osm.pbf and not the .osm.bz2 - same data, smaller file, faster loading.</p>
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