Request Historical data through ISIN

[achille1112]

Hi,
I have a problem when I search for a stock through ISIN.
For example if I want to download historical data of the BAYN stock through ISIN:

clear all; close all; clc;

percorso = 'W:\Software\IB4m-master\IB4m-master';

addpath(percorso); addpath(percorso,fullfile(percorso,'docs'))
javaaddpath(fullfile(percorso,'Jar','TWS973.jar'))

% initialize session with TWS
session = TWS.Session.getInstance();

% create local buffer for historical data events 
[buf,lh] = TWS.initBufferForEvent({
    TWS.Events.HISTORICALDATA,...
    });

% connect to TWS
session.eClientSocket.eConnect('127.0.0.1',7496,0);

pause(1)

contract = com.ib.client.Contract();

% contract.symbol('BAYN')
% contract.exchange('SMART');
% contract.primaryExch('IBIS');
% contract.currency('EUR');
% contract.secType('STK');

contract.exchange('SMART');
contract.primaryExch('IBIS');
contract.currency('EUR');
contract.secType('STK');
contract.secId('DE000BAY0017');
contract.secIdType('ISIN');

tickerId = 1000001;
endDateTime = [datestr(today,'yyyymmdd') ' 00:00:00'];
durationString = '1 Y';
barSizeSetting = '1 day';
whatToShow = 'TRADES';
useRTH = 1;
formatDate = 1;
keepUpToDate = false;

% ix = 0; while(isEmpty(buf) && ix < 100); ix = ix+1; pause(0.1); end

% request historical data for our contract for a year w/ 1-day bars
session.eClientSocket.reqHistoricalData(1000001,contract,endDateTime,durationString,barSizeSetting,whatToShow,useRTH,formatDate,keepUpToDate,[]); pause(0.5);

I obtain the following error:

The symbol or the local-symbol or the security id must be entered

How come I get this error?

Best Regards
Domenico.