TimerFcn in gui from one function to another

I have a gui that interfaces with some TDT software to play out electrical stimuli. I want to have an intertrial interval using a timer between trials. Essentially the timer is called at the end of a function and the TimerFcn is to call a different function.

So far, I have gone with creating the timer in the OpeningFcn:

%PUTTING IN THE TIMER
handles.gotimer = timer('TimerFcn',@(hObject,eventdata)GoButton_Callback(hObject, eventdata, handles),'StartDelay',15);

In the first function I call (GoButton_Callback), which is then the function to initialize another trial as well, I stop the timer:

%stop the timer
stop(handles.gotimer)
guidata(hObject,handles);

That function then calls one of my playback functions, at the end of which I run the timer and go back to the GoButton:

if rep_num < 65;
start(handles.gotimer);
guidata(hObject,handles);
end

At this point, the GoButton function goes to stop the timer (see above), and I get an error:

??? Error while evaluating TimerFcn for timer 'timer-7'

Reference to non-existent field 'gotimer'.

I should note that the number of the timer does seem to be creeping up, so I'm wondering if I keep creating another timer object. Anyone have ideas?

Answer 1

[Sean de Wolski]

As for the timers incrementing count. This will happen. Make sur eyou delete your timers when you are done with them!

t = timerfind;

or

t = timerfindall;

And:

if ~isempty(t)
  stop(t)
  delete(t);
end