Get Delayed Data with Interactive Brokers API

Hello,

I have Matlab R2015b running with the latest IB TWS API. The API seems to be working. As I only have a trial account at the moment, I would like to retrieve delayed data with the API. However, the standard function 'getdata' seems not to be working. Specifically, when I call

d = getdata(ib,ibContract)

d = Requested market data is not subscribed.Delayed market data is available.Error&BEST/STK/Top&BEST/STK/Top

How do I set it up, so that I can access delayed data instead?

Thank you,

[OUISSEM CHAABANI]

Hi,

I have the same problem.

Could someone help please !