Why do I get "No method 'reqHistoricalDataEx' with matching signature found for class 'COM.TWS_TwsCtrl_1'." in 2014a

When I try to use the 'ibtws' class in MATLAB R2014a to access data from the Interactive Brokers (IB) Trader Workstation , for instance if I am trying to run the following example function 'hisotry', I get the following error:

No method 'reqHistoricalDataEx' with matching signature found for class 'COM.TWS_TwsCtrl_1'.

Error in ibtws/history (line 90) c.Handle.reqHistoricalDataEx(1,s,endDateTime,durationString,period,ticktype,0,1)

My code is as follows, how can I fix this? Thanks

IB = ibtws('',7496); ibContract = IB.Handle.createContract; ibContract.symbol = '700'; ibContract.secType = 'STK'; ibContract.exchange = 'SEHK'; ibContract.currency = 'HKD';

startdate = floor(now) - 5; enddate = floor(now);

Test = history(IB,ibContract,startdate,enddate) ;

Answer 1

[Yair Altman]

You may wish to try the cross-platform IB-Matlab product, which is Java-based (not ActiveX):

http://undocumentedmatlab.com/ib-matlab

IB-Matlab doesn't have such bugs, it is very reliable.