<p>Yes it works but the code in 5.2 is broken. Here's an example, maybe it's more clear:</p>
<p>sip_trace(); /* traces to database only no db url <em>/<br>
sip_trace("", "$var(correlation_id)"); /</em> does not work; requires valid duplicate uri <em>/<br>
// with my additions<br>
sip_trace("", "$var(correlation_id)", "d"); /</em> does not work; requires valid duplicate uri */</p>
<p>So there are basically 2 functions:</p>
<ul>
<li>no arguments - trace to dabase only;</li>
<li>with any kind of arguments - trace to duplicate uri and(if set) to database;</li>
</ul>

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