====== Cache Resources Exhausted in Imagemagick ======

When you try to convert multiple image files into a single PDF, you may see a series of errors that look like this:

<code>
convert-im6.q16: cache resources exhausted `file1.jpg' @ error/cache.c/OpenPixelCache/4095.
</code>

You can solve this by increasing the amount of memory available to Imagemagick.  First, locate the Imagemagick policy file.  It will be something like ''/etc/ImageMagick-6/policy.xml''.  Then, find a line that looks like this:

<code xml>
<policy domain="resource" name="disk" value="1GiB"/>
</code>

And increase the value, e.g.:

<code xml>
<policy domain="resource" name="disk" value="8GiB"/>
</code>