2017-06-02 12:33:32 [ERROR] Erreur d'écriture du rapport.
2017-06-02 12:33:32 [ERROR] java.lang.NullPointerException
        at org.apache.cocoon.xml.XMLUtils.data(XMLUtils.java:324)
        at org.apache.cocoon.xml.XMLUtils.createElement(XMLUtils.java:481)
        at org.ametys.plugins.odfpilotage.reports.GroupesReport._writeGroupsReport(GroupesReport.java:261)
        at org.ametys.plugins.odfpilotage.reports.GroupesReport.runReport(GroupesReport.java:125)
        at org.ametys.plugins.odfpilotage.reports.AbstractReport.run(AbstractReport.java:83)
        at org.ametys.plugins.odfpilotage.reports.GroupesReport.run(GroupesReport.java:118)
        at org.ametys.plugins.odfpilotage.AbstractPilotageElement.run(AbstractPilotageElement.java:141)
        at org.ametys.plugins.odfpilotage.PilotageEngine.run(PilotageEngine.java:61)
        at java.lang.Thread.run(Thread.java:745)