Use of Mail Adapter in PO 7.40

Hi Expert,

I configured in my IFLow the use of Mail Adapter and works fine, but now I have the need to extend my interface also use the CC field in the email.

I have already add the parameter CC in my IFlow and in my Operation Mapping as I already do for the parameter TO and this part is ok or that's how it seems.

The problem/error appears in the java mapping when I manage this new parameter and insert it in the structure, see code below:

...

      String to = getInputParameters().getString("TO");

      String cc = getInputParameters().getString("CC");

...

      this.rootElement = new XMLElement("ns1:Mail", XMLElement.XML_TYPE_ELEMENT, null);

      this.rootElement.addAttr("xmlns:ns1", "http://sap.com/xi/XI/Mail/30");

      if ((sid.equals("I3O")) || (sid.equals("K3O"))) {

     this.rootElement.addElement("Subject", 1, " Lieferterminmeldung fuer fehlerhafte Auftraege - " + sid);

      } else {

     this.rootElement.addElement("Subject", 1, " Lieferterminmeldung fuer fehlerhafte Auftraege");

      }

      this.rootElement.addElement("From", 1, "a@a.com");

      this.rootElement.addElement("To", 1, to);

      this.rootElement.addElement("Cc", 1, cc);

      this.rootElement.addElement("Content_Type", 1, "text/html");

      this.rootElement.addElement("Content", 1, content);

...

The error that I found on Message Monitor is:

Could someone help me  figure out where is my mistake?

Thanks in advance for any help