You should not try it in a companion, you need to compile it first.
can we create multi task with this extension?
@Xoma you might want to check, if the extension is running in the companion and display a nice error message in this case. .
Taifun
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I don’t understand why a sample “aia” project is not shared. @Xoma. Thanks for sharing though. I hope I’ll try to get it working in the comments.
great extension. thanks
looking forward for your next update.
I have a problem with 1.3, if I add the extension, There is problem parsing package when installing the app. with version 1.2 no problem
This is a known issue… I already reported it here almost 2 weeks ago…
Taifun
Hi, I would release an update that would also fix the old issues including the install error (there are many things changed, and sorry, I was quite inactive for some time)
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I am using ItoO - Background Task Extension only.
October 8 APK complied fine from kodukar. I complied the same app without any change on October 11. It’s not working
Please look in to this…
Thank you
Thuva
You could have found the answer yourself here
Taifun
PS: I will move this into the correct thread…
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Hi I’ve tested the extension in many different versions and it doesn’t work when I enter the package name! But when I leave the package name blank it works fine! Please get back to me about the problem!!
Get the latest version from here: [FREE] Background Tasks: Itoo - Extensions - MIT App Inventor Community
Greeat job 
could you please help me about when firebase database data changed block that how can I make logic for this whenever farebase database data changes the notification should appear for my admin app even my app is inactive…?
Well that is possible, well, hmm , what have you tried?
yes i did but it did’nt worked or may be i am doing it wrong .
Remember: i tried with simple notification it worked in foreground.
Do not use the old version, get the latest version from AppInventor community, i have not updated the topic here:
Blocks are okay or not…??
No, they are old blocks, deprecated.
could you plzz help me to create logic with your newer version of extension. please please…??
@Xoma now can we combined this for App active and foreground both?? & I want to run it continuesly until the user want to stop it because I am trying to use it for music player notification for foreground 
And if you have some time can you build a block and can you show for me?