<p>The example is wrong, indeed -- iirc, the transformations were not returning <code>$null</code> in the initial design, because they were supposed to be a property of a valid value. Not sure if there is any transformation returning <code>$null</code> right now.</p>
<p>However, changing this behaviour might break other existing configs, so this has to be discussed and analyzed properly.</p>
<p>Right now probably the <code>{s.count,;}</code> should be used to get what is the max index.</p>
<ul>
<li><a href="https://www.kamailio.org/wiki/cookbooks/5.3.x/transformations#scount_c" rel="nofollow">https://www.kamailio.org/wiki/cookbooks/5.3.x/transformations#scount_c</a></li>
</ul>

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