Fatal error: Uncaught ImagickException: width or height exceeds limit

[fran6t]

When gest-form.php want convert a large file .jpg to thumbnail possible have this error
Fatal error: Uncaught ImagickException: width or height exceeds limit

First investigation :
It's due to policy of imagick to avoid down server with limited ressource

On my debian server file configuration is /etc/ImageMagick-6/policy.xml

<policy domain="resource" name="memory" value="256MiB"/>
<policy domain="resource" name="map" value="512MiB"/>
<policy domain="resource" name="width" value="16KP"/>
<policy domain="resource" name="height" value="16KP"/>
<policy domain="resource" name="area" value="128MB"/>
<policy domain="resource" name="disk" value="1GiB"/>