Error Issuer id not found

[deook]

My bank require the issuerID and in SEPA Direct Debit PAIN.008.001.02 XML File Structure is mandatory, it can to be the same as creditor_id
Example:
GrpHdr>
MsgId>PRE2017011213013569700001112121
CreDtTm>2017-01-12T13:01:35
NbOfTxs>1
CtrlSum>361.07
InitgPty>
Nm>JOSE PABLO PALENCIA MORCHON
Id>
OrgId>
Othr>
Id>ES84001121111111Y
/Othr>
/OrgId>
/Id>
/InitgPty>
/GrpHdr>

Solution: changes in:
private function createGroupHeader(){
//Retrieve the CstmrDrctDbtInitn node
$CstmrDrctDbtInitnNode = $this->getCstmrDrctDbtInitnNode();

    //Create the required nodes
    $GrpHdrNode     = $this->xml->createElement("GrpHdr");
    $MsgIdNode      = $this->xml->createElement("MsgId");
    $CreDtTmNode    = $this->xml->createElement("CreDtTm");
    $NbOfTxsNode    = $this->xml->createElement("NbOfTxs");
    $CtrlSumNode    = $this->xml->createElement("CtrlSum");
    $InitgPtyNode   = $this->xml->createElement("InitgPty");
    $NmNode         = $this->xml->createElement("Nm");
    $InitgPtyNode_IdNode=$this->xml->createElement("Id");
    $InitgPtyNode_Id_OrgIdNode=$this->xml->createElement("OrgId");
    $InitgPtyNode_Id_OrgId_OthrNode=$this->xml->createElement("Othr");
    $InitgPtyNode_Id_OrgId_Othr_IdNode=$this->xml->createElement("Id");
    
    //Set the values for the nodes
    $MsgIdNode->nodeValue = $this->makeMsgId();
    $CreDtTmNode->nodeValue = date('Y-m-d\TH:i:s', time());

   //If using lower than PHP 5.4.0, there is no ENT_XML1
    if( version_compare(PHP_VERSION, '5.4.0') >= 0){
        $NmNode->nodeValue = htmlentities($this->config['name'],ENT_XML1, 'UTF-8' );
    }else{
        $NmNode->nodeValue = htmlentities($this->config['name'],ENT_QUOTES, 'UTF-8' );
    }
    if ( isset( $this->config['Issuer_id'] ) ) {
    	$Issuer_id=$this->config['Issuer_id'];
    	
    } else {
    	$Issuer_id=$this->config['creditor_id'];
    }
    //If using lower than PHP 5.4.0, there is no ENT_XML1
    if( version_compare(PHP_VERSION, '5.4.0') >= 0){
    	 $InitgPtyNode_Id_OrgId_Othr_IdNode->nodeValue = htmlentities($Issuer_id,ENT_XML1, 'UTF-8' );
    }else{
    	 $InitgPtyNode_Id_OrgId_Othr_IdNode->nodeValue = htmlentities($Issuer_id,ENT_QUOTES, 'UTF-8' );
    }

    
    //Append the nodes
    $InitgPtyNode->appendChild($NmNode);
    $InitgPtyNode->appendChild($InitgPtyNode_IdNode);
    $InitgPtyNode_IdNode->appendChild($InitgPtyNode_Id_OrgIdNode);
    $InitgPtyNode_Id_OrgIdNode->appendChild($InitgPtyNode_Id_OrgId_OthrNode);
    $InitgPtyNode_Id_OrgId_OthrNode->appendChild($InitgPtyNode_Id_OrgId_Othr_IdNode);
    $GrpHdrNode->appendChild($MsgIdNode);
    $GrpHdrNode->appendChild($CreDtTmNode);
    $GrpHdrNode->appendChild($NbOfTxsNode);
    $GrpHdrNode->appendChild($CtrlSumNode);
    $GrpHdrNode->appendChild($InitgPtyNode);
    
    //Append the header to its parent
    $CstmrDrctDbtInitnNode->appendChild($GrpHdrNode);
    
}//createGroupHeader