Could you explain me why do you need self.timer_backup?
The only way how to call savexml from set_task & remove_task should be through a timer. In other words, there can't savexml in set_task & remove_task methods.
Please, decrease Timer time to shorter interval like 1 or 2 seconds. (This should prevent bursts of savexml calls but still saving enough and not lose data)
If something is not clear, feel free to contact me directly :)
Could you explain me why do you need self.timer_backup?
The only way how to call savexml from set_task & remove_task should be through a timer. In other words, there can't savexml in set_task & remove_task methods.
Please, decrease Timer time to shorter interval like 1 or 2 seconds. (This should prevent bursts of savexml calls but still saving enough and not lose data)
If something is not clear, feel free to contact me directly :)