<h3>Description</h3>
<p>I got parse error in config file.<br>
I am using MSRP module and if I try to use (to print a log) with <code>$msrp(msgid)</code> I get an error. According to the psudovariables documentation should work.</p>

<h3>Troubleshooting</h3>
<h4>Reproduction</h4>
<p>Just use within an event_route[msrp:frame-in]  block $msrp(msgid).</p>
<h4>Log Messages</h4>

<pre><code>0(9827) ERROR: msrp [msrp_vars.c:118]: pv_parse_msrp_name(): unknown PV msrp name msgid
 0(9827) ERROR: <core> [pvapi.c:877]: pv_parse_spec2(): pvar "msrp" has an invalid name param [msgid]
 0(9827) ERROR: <core> [pvapi.c:1032]: pv_parse_spec2(): wrong char [)/41] in [$msrp(msgid)] at [11 (5)]
 0(9827) : <core> [cfg.y:3368]: yyerror_at(): parse error in config file route.cfg, line 649, column 40-51: Can't get from cache: $msrp(msgid)
ERROR: bad config file (1 errors)
</code></pre>
<h3>Additional Information</h3>
<ul>
<li>
<p><strong>Kamailio Version</strong> -4.4.5</p>
</li>
<li>
<p><strong>Operating System</strong>:</p>
</li>
</ul>

<pre><code>Linux test 2.6.32-642.15.1.el6.x86_64 #1 SMP Fri Feb 24 14:31:22 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
</code></pre>

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