topic Re: What is the use of Task Dependencies in QlikView

What is the use of Task Dependencies

gainkarthi — Mon, 26 Jan 2026 18:19:17 GMT

I could see even having chain jobs is not showing any task dependencies, so this is something different.

Any idea.

Re: What is the use of Task Dependencies

gainkarthi — Fri, 06 Sep 2013 12:17:43 GMT

Any help on this please?

Re: What is the use of Task Dependencies

rajeshvaswani77 — Fri, 06 Sep 2013 12:27:06 GMT

Are your tasks depend on other tasks? On success of task 1 perform task 2.

My guess is that is what the dependency should show.

thanks,

Rajesh Vaswani

Re: What is the use of Task Dependencies

gainkarthi — Fri, 06 Sep 2013 12:30:06 GMT

Yes there is a one after another. But I have checked it, it's no longer related to that.

so this is something different.

Regards,

Karthi

Re: What is the use of Task Dependencies

gainkarthi — Tue, 10 Sep 2013 09:27:43 GMT

Can anyone help on this ?

Re: What is the use of Task Dependencies

Peter_Cammaert — Tue, 10 Sep 2013 09:28:03 GMT

"Task Dependencies" serve a slightly different purpose than chained tasks.

A task chain lets Task 2 automatically start when Task 1 finishes with either status = success or status = failure

A Task Dependency (for example Task 3) will let the same Task 2 run only if the last run of Task 3 (whenever it occurred) was either succesfull or faulty. Task 3 will NOT trigger Task 2 but will block Task 2 from running if the last execution result of Task 3 was not the exepected one.

Task Dependencies will in the end override any other triggers. They have a pretty final say here.

Luck,

Peter.

Re: What is the use of Task Dependencies

gainkarthi — Tue, 10 Sep 2013 09:44:41 GMT

Hi Peter,

Thanks for the response. will try and let you know.

Regards,

Karthi

Re: What is the use of Task Dependencies

patricio — Tue, 29 Oct 2013 18:00:06 GMT

I would like to add some complementary information even if Peter has already answered the original question.

I will use the same task names as Peter did.

If Task 3 (the dependency task) is executed successfully, all the subsequent executions of Task 2 will occur until the next execution of Task3.

If Task 3 is unsuccessful, all the subsequent executions of Task 2 will fail until the next execution of Task 3. The log message in the console (or email) will have the following:

Warning Dependency check failed due to current errors in execution of task "Task 3".

Error The task "Task 2" failed.

Note: I didn’t test what happens at the end of the day. Is everything reset or not? I did not find documentation for this.

Example:

Task 3 ok

Task 2 ok

Task 3 Fails

Task 2 Fails (the script is not executed)

Task 3 ok

Task 2 ok

Etc.