Windows 10: Bug? Schedule task trigger a day before & on next start-up after schedule, All Win10ver

Schedule task set on 08:00:00 hour once a week on any day of the week get trigger outside schedule as follow :

Trigger 1 : exactly 08:00:00 a day before the schedule date.
example : task Z set to run on 08:00:00 every monday of week, trigger & success complete on 08:00:00 of sunday

Trigger 2 : the next start-up after the actual schedule trigger.
example : task Z set to run on 08:00:00 every monday of week, trigger a "missed task start rejected" on next system/machine start-up after the actual schedule.
if the "next start-up" were next day, that the history logged the "missed task..." is next day,
if the "next start-up" were 2 hour later, then the history logged the "missed task..." is 2 hour later.
>> after the actual schedule task done, restart the system only the first next start-up right after the schedule will log a history of "missed task start rejected" event.

* Tested can be replicate on both windows 10 pro ver 2004 latest updated & home ver 2004 latest updated

* Occur on any day of the week mon-fri as long as the time if exactly 08:00:00
* Only task set for exactly 08:00:00 hour trigger this "bug", any thing like 07:59:59 or 08:00:01 wouldn't trigger the bug.
* Can occur on multi trigger task as long as one of the trigger time is 08:00:00 and only that 08:00:00 schedule trigger this bug.

Testing machine info :
OS : Win 10 pro ver 2004, Win 10 home ver 2004
OS time zone : GMT+8
OS language : Eng UK
*** yet to test for different time time zone!

:)

 

Windows Task Scheduler does not trigger a task, after a PC-restart during the day

Hi Jarius,



Thank you for your reply.

• On October 25, 2016, I checked the Windows Task Scheduler settings, according to your advice.
• The next morning I powered-on my PC at 09:30 and made a screendump of the Task Scheduler at 10:08.
  
  At that time 2 of my 5 scheduled backup task were triggered conform schedule and the according backups were carried out correctly (see the green framed surfaces in the 10:08 window below)
• I powered-off my PC at 10:12 and powered it on again at 15:45.

• At 15:50 I made a sreendump of the Task Scheduler window, where was indicated that 3 backup tasks were carried out correctly in the past at about 10:00 (see the green framed surfaces in the 15:50 window in the picture above).
• At 16:40 I made a screendump again. Now the backup task that were triggered after the first power-on at about 10:00, now were not triggered anymore (the red framed surfaces in the 16:40 window) and the backup task that were not triggered during the first
  power-on, were now triggered correctly at about 16:00 (the green framed surfaces in the 16:40 window).
• I also made screendumps again at 17:40 and 18:40. In both cases the backup tasks triggered during the first power-on at 9:30 were not triggered anymore and the backup tasks that were not triggered during the first power-on were correctly triggered with
  the scheduled 1 hour interval.

My conclusion:

• If my PC is powered-on before the first scheduled backup task, all backup job triggers are carried out conform schedule.
• After a PC restart the previously triggered backup task are not triggered anymore during the rest of the day.
• Only backup tasks that were not triggered before the PC restart, are triggered correctly after the PC restart.
• A manual run of a backup task always result in a correct backup task trigger.

This must be a bug in the Windows Task Scheduler.



I hope you will find a solution for this problem.



Best regards, Wim

 

Task Scheduler: task gets triggered by event but does not start

I know a thing or two about the Task Scheduer but so far I am unable to wrap my mind around your problem. Here is why:

• I do not recognise the screen snapshot your posted. What is it?
• What event is supposed to trigger the scheduled task?
• What is the scheduled task supposed to run?
• You write "there is the initial event 108 showing the event getting triggered". How can an event trigger another event?
• Do time-triggered tasks work reliably?

 

Windows Task Scheduler does not trigger a task, after a PC-restart during the day

The problem:

I started my PC before the first Backup4all (my backup program) task schedule (at 10:00) and during the day all Backup4all backups were made correctly, with an interval of the programmed 1 hour.

At 15:45 I restarted my PC. No Backup4all backups were made from the moment the PC was restarted.

At 16:13 I made a screendump of the Windows Task Scheduler (see below).

You
can see in the attachment that Windows Task Scheduler updates the Next Run Time at about 16:00, but Last Run Time remains on the one before PC-restart.

So Backup4all is not triggered by the Windows Task Scheduler to backup.

At 16:33 a made a screendump of the Windows Task Scheduler screen again and you see in the blue frame that the Next Run Time is updated, but Last Run Time is not.

I also enabled the Windows Task Scheduler History and at 16:33 you see that the last event was from 15:00



Finally I used the Action "Run" in the Windows Task Scheduler at 17:17 and Backup4all started the backup successfully at 17:17:09.

Now the Windows Task Scheduler History also shows an event: that the task is completed



It seems that Windows Task Scheduler triggers the backup job correctly, when the PC is powered-on before the first task schedule time. After a PC restart or a daily power-on after the first backup should be made, the backup program is not triggered by Wimndows
Task Scheduler anymore.

I tried this by both the “Run task as soon as possible after a scheduled start is missed" checked and unchecked. In case of a check, the backup tasks are still not triggered by Windows Task Scheduler.

Does anybody has a solution for this problem, or is it a bug in the Windows Task Scheduler ( the problem started to occur a few month ago).