JavaScript runtime error Incorrect function - The strangest errors

Question

I'm writing a Windows 8 app using Javascript. I got this problem when testing my app using Windows 8 emulator. This seems a bug of ui.js.

Exception was thrown but not handled in user code at line 22600, column 25 in ms-appx://microsoft.winjs.1.0.rc/js/ui.js

0x800a138f - JavaScript runtime error: Unable to get property 'style' of undefined or null reference

If there is a handler for this exception, the program may be safely cont

It points to this line.

that._viewport.style.opacity = 1.0;

Console log

SCRIPT5007: Exception was thrown but not handled in user code at line 22600, column 25 in ms-appx://microsoft.winjs.1.0.rc/js/ui.js
0x800a138f - JavaScript runtime error: Unable to get property 'style' of undefined or null reference
File: ui.js, line: 22600 column: 25

Update: Today 2012/08/09. When I run my app, it generates one more strange error in jquery.js and ui.js. What's wrong with them???

'WWAHost.exe' (Script): Loaded 'Script Code (MSAppHost/1.0)'. 
Exception was thrown at line 5200, column 4 in ms-appx://7034140f-baab-4c76-b27c-2a4c76641550/js/jquery.js
0x800a139e - JavaScript runtime error: SyntaxError
Exception was thrown at line 28908, column 30 in ms-appx://microsoft.winjs.1.0.rc/js/ui.js
0x80004005 - JavaScript runtime error: Incorrect function.

So the error says that that._viewport is undefined. Have you checked what that._viewport reference to at this line. Maybe you should shows soem more code. — Andreas Köberle
– Andreas Köberle, Commented Sep 2, 2012 at 11:50
That file is from Windows SDK. How could it throws an exception? :-S — emeraldhieu
– emeraldhieu, Commented Sep 2, 2012 at 16:58
do you u have an encapsulated test case you can pop onto dropbox or the like? What's the code you have written that results in the error? — Jim O'Neil
– Jim O'Neil, Commented Sep 2, 2012 at 19:06
My app loads content from cloud and even uses JQuery. I think JQuery is the problem. I don't know why sometimes when starting my app, it crashes and throws it. I tried this stackoverflow.com/questions/10859523/… but it still generates some strange errors. — emeraldhieu
– emeraldhieu, Commented Sep 3, 2012 at 3:21

Raymond Chen · Accepted Answer · 2012-09-04 23:02:18Z

1

Sadly, this is a known bug in WinJS in the RC build of Windows 8. The good news is that the bug is fixed in the RTM build.

answered Sep 4, 2012 at 23:02

Raymond Chen

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7 Comments

emeraldhieu Over a year ago

If it's a bug, how to get a free fix for developer now?

Raymond Chen Over a year ago

The RTM build is available on MSDN.

emeraldhieu Over a year ago

... and it requires .NET Framework 4.5.5 (not free for developer)

Raymond Chen Over a year ago

The download page for developing apps for the Windows 8 Store is here. There is a link to a free trial of Windows 8 RTM on that page.

emeraldhieu Over a year ago

I don't see a link for Visual Studio RTM. Could you give the full URI? The download page shows "There is no subscription associated with your Live ID. Add a subscription to this account."

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