# Not Handled: OnNewAll

**URL:** <https://forums.fusetools.com/t/not-handled-onnewall/2777>\
**Category:** General\
**Created:** [February 28, 2016, 11:32am UTC](https://forums.fusetools.com/t/not-handled-onnewall/2777 "2016-02-28T11:32:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Fahad](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Fahad](https://forums.fusetools.com/u/Fahad)\
**Post date:** [February 28, 2016, 11:32am UTC](https://forums.fusetools.com/t/not-handled-onnewall/2777/1 "2016-02-28T11:32:52Z")

</div>

I get the error `Not Handled: OnNewAll` after I changed some ux and js, and I changed a lot. I can’t at all trace it back to what it is now despite removing a lot of code trying to narrow it down, there’s nothing to indicate where the problem is or even what this means at all, I really want to be more specific but this is literally all I know.

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<div class="post-metadata">

**Author:** ![Anders\_Lassen](https://yyz1.discourse-cdn.com/flex035/user_avatar/forums.fusetools.com/anders_lassen/32/522_2.png) [@Anders\_Lassen](https://forums.fusetools.com/u/Anders_Lassen)\
**Post date:** [February 28, 2016, 12:14pm UTC](https://forums.fusetools.com/t/not-handled-onnewall/2777/2 "2016-02-28T12:14:10Z")

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Hi,

Thanks for providing the test case on slack.

I am unable to reproduce the problem in version 0.10. Unless you have other steps needed to reproduce the crash, I am assuming this is fixed.

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<div class="post-metadata">

**Author:** ![Fahad](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Fahad](https://forums.fusetools.com/u/Fahad)\
**Post date:** [February 28, 2016, 4:56pm UTC](https://forums.fusetools.com/t/not-handled-onnewall/2777/3 "2016-02-28T16:56:32Z")

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Fixed! Problems where an Observable list was being generated from a save file generated by the app which has become corrupted somehow, after replacing this file and updating fuse everything worked out 4 hours later 😃

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<div class="post-metadata">

**Author:** ![developer](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@developer](https://forums.fusetools.com/u/developer)\
**Post date:** [June 6, 2016, 6:57am UTC](https://forums.fusetools.com/t/not-handled-onnewall/2777/4 "2016-06-06T06:57:12Z")

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I had the same error. Took me about 8 hours or so of trying everything before I came across this thread. Slow learner 😉

No idea what the problem was. Solved by loading an example that was working, pasted my code into it, and go figure - my code now worked. Frustrating.

Hope this helps someone else!

FOR REFERENCE.

This is my code with the line that didn’t work and then did work (in another file):

```auto

var data = Observable();

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
       if (xhttp.readyState == 4 && xhttp.status == 200) {
             var schedule = JSON.parse(xhttp.responseText);
             if (schedule.length > 0) {
                        for (var i = 0; i < schedule.length; i++) {
                            data.add(schedule[i]); // THIS IS THE LINE THAT CAUSED THE ERROR
                        }
                    } else {
                        console.log('Empty Schedule Received');
                    }
                }
};
xhttp.open("GET", "https://www.someaddresshere.com/getSchedule&quot;, true);
xhttp.send();

```

This is the full error that I had:

```auto
ERROR: Not handled: OnNewAll
    System.Exception occured.
      at Fuse.Reactive.DataBinding1[System.String].Fuse.Reactive.IObserver.OnNewAll (Fuse.Scripting.Array values) [0x00000] in &lt;filename unknown&gt;:0 
      at Uno.Threading.IDispatcherExtensions+Arg1Invoke1[Fuse.Scripting.Array].Run () [0x00000] in <filename unknown>:0 
      at Fuse.Reactive.Dispatcher.Run () [0x00000] in <filename unknown>:0 
      at Fuse.UpdateListener.Invoke () [0x00000] in <filename unknown>:0 
      at Fuse.UpdateManager.Update (Fuse.Stage stage) [0x00000] in <filename unknown>:0

```