Timer deletion Problem while closing an app in app designer

Hello all

I have created an app with a button using app designer, which on button click will create a timer. This timer will invoke a function after specified delay.However when i close the app ,MATLAB is automatically deleting the running timer object.How can i run the timer even after closing the app?

Kindly help.Thanks in advance

function buttonclick_callback()
delay_seconds=10000;
tmr = timer('Name','delay_timer','TimerFcn',@(~,~)upload_status,'StartDelay',delay_seconds);
start(tmr)
end