for example, this parameter blocks the application :
<param id="synchronisation.hour.2" type="long"> <label i18n="true">SYNCHRONISATION_HOUR_2</label> <description i18n="false">A</description> <default-value>4</default-value> <category i18n="true">PLUGINS_SYNCHRONISATION_FREQUENCY_LABEL</category> <group i18n="true">SYNCHRONISATION_FREQUENCY_SETTINGS</group> <order>10</order> </param>