Test script to test it:

NodeName="xxxxx";  //existing node name

Mynode = FindObject(NodeName);

value=%(1,2,3,4,5,6,7,8,9,10);  //new dci names

for (v : value) {
     if (!FindDCIByName(Mynode, v))
     {
      		println("-------------------NEW----------------------------");
		newDci = CreateDCI(Mynode, DataSource::INTERNAL, v , "TEST " . v, DCI::FLOAT, null, 0);  // <<-- null,0 = OK  // null,null = random retentionTime result // 0,0 = 0 pollingInterval set
     }
    	else
    {
    		println("-------------------" . NodeName . "->". v . "  ALREADY EXIST----------------------------");
    }
}

Thanks
Alessandro