Using Bloomberg RealTime function

I am trying to bring realtime data in matlab from bloomberg, and having trouble with the function. Here is my code:

t = timer('StartDelay', 4,'Period', 4,'TasksToExecute', ... 2,'ExecutionMode','fixedRate');
d = realtime(c,'SPY US ... Equity','LAST_PRICE','my_bloombergplot_fcn');
t.TimerFcn = { @my_bloombergplot_fcn,d};
start(t)

and

function my_bloombergplot_fcn(obj,event,Series)
Series.LAST_PRICE

end

All I'm trying to do here is initialze the structure that will contain the data, and start a time that prints out thhe last price. When I run it I get a stream of lines saying 'Not enough input arguments'

Thanks for your help.

[Sean de Wolski]

what is 'c'?

[Sean de Wolski]

(as thew first input to realtime() )?