Schedule task for a build

[teognost]

I have created a schedule task for my build from
Tools->CreateScheduledTask.During the automated build some project macros would be changed.
The scheduled task is set to stop automatically if running for a number of n hours (normally should terminate in aprox 1 hour).
Next day when I check the results-scheduled task was executed but the macros are unchanged.
I guess this is because the scheduled task was stopped(after build ended the task still remained as running)and therefore the changed macros were not saved.
So the question is -how can I execute an automated build as scheduled task and after execution to be closed and all the changes saved?
Even if I set the scheduled task not to be stopped after n hours-still the project remains open and the macros are not saved unless I would manually choose to save them with File->Save(and I want to avoid any manual intervention).
Tks for any info