<p></p>
<p>I config ims_diameter_server as below:</p>
<pre><code>#!ifdef WITH_DIAMETER_SERVER
# IMS_DIAMETER_SERVER
event_route[diameter:request]{
      xlog("L_INFO","ims Got diameter message");
#      diameter_request("hss.ims.mnc001.mcc001.3gppnetwork.org", $diameter_application, $diameter_command, $diameter_request);
      diameter_request_async("hss.ims.mnc001.mcc001.3gppnetwork.org", $diameter_application, $diameter_command, $diameter_request);
      xlog("L_INFO","ims Forwarded Diameter Request");
}
event_route[diameter:response] {
        xlog("L_INFO","ims Reply to Diameter request is $diameter_response\n");
}
#!endif
</code></pre>
<p>And got a response from hss:<br>
<a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/10116705/138629415-dd7f6266-7801-4ed3-8922-a0b9cba4089a.png"><img src="https://user-images.githubusercontent.com/10116705/138629415-dd7f6266-7801-4ed3-8922-a0b9cba4089a.png" alt="image" style="max-width: 100%;"></a><br>
but got  response in log:</p>
<blockquote>
<p>90(124) INFO: <script>: ims Got diameter message90(124) DEBUG: ims_diameter_server [avp_helper.c:59]: avp2json(): AVP((nil) < 0x7f44c2ad16f0 >0x7f44c2ad0c08);code=263,flags=40;<br>
89(123) INFO: <script>: ims Reply to Diameter request is </p>
</blockquote>
<p>$diameter_response is , why, how to fix it?</p>

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