exception 'NSInvalidArgumentException' NSHealthUpdateUsageDescritption : <p>Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSHealthUpdateUsageDescription must be set in the app's Info.plist in order to request write authorization.'</p>

<p>Info.plist has this entry</p>

<pre><code>&lt;key&gt;NSHealthShareUsageDescription&lt;/key&gt;
&lt;string&gt;some string value stating the reason&lt;/string&gt;
</code></pre>
