Dans /etc/ImageMagick-6/policy.xml

Remplacer

<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"/>
<policy domain="coder" rights="none" pattern="PDF" />

par

<policy domain="resource" name="memory" value="1024MiB"/>
<policy domain="resource" name="map" value="1024MiB"/>
<policy domain="resource" name="width" value="16KP"/>
<policy domain="resource" name="height" value="16KP"/>
<policy domain="resource" name="area" value="1024MB"/>
<policy domain="resource" name="disk" value="1GiB"/>
<policy domain="coder" rights="read|write" pattern="PDF" />

Pour juste autoriser la lecture et création de pdf :

sudo sed -i 's#<policy domain="coder" rights="none" pattern="PDF" />#<policy domain="coder" rights="read|write" pattern="PDF" />#' /etc/ImageMagick-6/policy.xml

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