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    <p>at first you must check that this collection is exist or not. you can do this with :</p> <pre><code>&lt;iq type='get' id='123456'&gt; &lt;list xmlns='http://www.xmpp.org/extensions/xep-0136.html#ns' with='jabbar@localhost'&gt; &lt;set xmlns='http://jabber.org/protocol/rsm'&gt; &lt;max&gt;30&lt;/max&gt;/*max number of collection that you want to retrieve*/ &lt;/set&gt; &lt;/list&gt; &lt;/iq&gt; </code></pre> <p>response from ejabberd:</p> <pre><code>&lt;iq xmlns='jabber:client' from='root@localhost' to='root@localhost/24975890851351278205927376' id='123456' type='result'&gt; &lt;list xmlns='http://www.xmpp.org/extensions/xep-0136.html#ns'&gt; &lt;chat with='jabbar@localhost/2021512663135182487476431' start='2012-10-24T13:45:17.000000Z'/&gt; &lt;chat with='jabbar@localhost/9286394041351135710472543' start='2012-10-25T20:09:13.000000Z'/&gt; &lt;chat with='jabbar@localhost/9286394041351135710472543' start='2012-10-25T21:22:13.000000Z'/&gt;/****** I will retrieve this *****/ &lt;chat with='jabbar@localhost/9286394041351135710472543' start='2012-10-25T22:05:13.000000Z'/&gt; &lt;chat with='jabbar@localhost' start='2012-10-25T23:03:14.000000Z'/&gt; &lt;chat with='jabbar@localhost' start='2012-10-25T23:35:37.000000Z'/&gt; &lt;set xmlns='http://jabber.org/protocol/rsm'&gt; &lt;first index='0'&gt; 63518305517@1 &lt;/first&gt; &lt;last&gt; 63518427337@15 &lt;/last&gt; &lt;changed&gt; 2012-10-25T23:37:21.000000Z &lt;/changed&gt; &lt;count&gt; 6 &lt;/count&gt; &lt;/set&gt; &lt;/list&gt; &lt;/iq&gt; </code></pre> <p>now for retrieving message from a collection you must input exactly "start" and "with" in request stanza:</p> <pre><code>&lt;iq type='get' id='433534536'&gt; &lt;retrieve xmlns='http://www.xmpp.org/extensions/xep-0136.html#ns' with='jabbar@localhost/9286394041351135710472543' start='2012-10-25T21:22:13.000000Z'&gt; &lt;set xmlns='http://jabber.org/protocol/rsm'&gt; &lt;max&gt;100&lt;/max&gt; &lt;/set&gt; &lt;/retrieve&gt; &lt;/iq&gt; </code></pre> <p>response:</p> <pre><code>&lt;iq xmlns='jabber:client' from='root@localhost' to='root@localhost/24975890851351278205927376' id='433534536' type='result'&gt; &lt;chat with='jabbar@localhost/9286394041351135710472543' start='2012-10-25T21:22:13.000000Z'&gt; &lt;from secs='0'&gt; &lt;body&gt; dddddddddd &lt;/body&gt; &lt;/from&gt; &lt;from secs='1'&gt; &lt;body&gt; dddddddd &lt;/body&gt; &lt;/from&gt; &lt;set xmlns='http://jabber.org/protocol/rsm'&gt; &lt;first index='0'&gt; 63518419333@103 &lt;/first&gt; &lt;last&gt; 63518419334@105 &lt;/last&gt; &lt;changed&gt; 2012-10-25T21:22:14.000000Z &lt;/changed&gt; &lt;count&gt; 2 &lt;/count&gt; &lt;/set&gt; &lt;/chat&gt; &lt;/iq&gt; </code></pre>
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    1. POejabberd mod_archive_odbc internal-server-error
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    1. USjabbar
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    1. COI was trying exactly the same thing, but I got an error. If i query collection which doesn't exists, he return me "item-not-found", but if I query correct collection he returns me an error :( . What mod you use on ejabberd server side?
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    2. COi use mod_archive_odbc with mysql external database.your database schema is correct?.look at tables of ejabberd and be sure that collections and time you wanna retrieve(utc) are exist.
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    3. COwhat's your ejabberd and erlang error log?
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