[Xerte] Re: The project data has not loaded.

Fri Mar 13 14:20:49 GMT 2015

Ron, John, John and Julian

Thanks all, for your input on this. I think I'll have to ask my IT colleagues to see if they can take this forward.

Best
Oliver

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation Unit
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

-----Original Message-----
From: xerte-bounces at lists.nottingham.ac.uk [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Smith, John
Sent: 12 March 2015 14:47
To: JohnBijnens1 at gmail.com; Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Hi John,

I don't think so as it is usually video and these partial 206 issues. It seems to be an issue within Webkit which is the engine that Safari and Chrome are based on and has been causing these types of issues for well over a year...

You can see some issues here https://code.google.com/p/chromium/issues/detail?id=234779 and also how to reproduce and identify...

Regards,

John Smith | Learning Technologist
Room A250, Govan Mbeki Building | School of Health & Life Sciences | Glasgow Caledonian University Cowcaddens Road | Glasgow | G4 0BA

Please address ALL support requests to hlsblt at gcu.ac.uk where one of the School Learning Technologists will pick up the job. This will ensure that all jobs are completed as promptly as possible.
________________________________________
From: xerte-bounces at lists.nottingham.ac.uk [xerte-bounces at lists.nottingham.ac.uk] On Behalf Of John Bijnens [johnbijnens1 at gmail.com]
Sent: 12 March 2015 14:44
To: xerte at lists.nottingham.ac.uk
Subject: [Xerte] Re: The project data has not loaded.

Hi,

Do these multiple request have something to do with the prefetch function of Google Chrome ?
You can find more info about this prefetch function at the following URL http://www.technipages.com/google-chrome-prefetch

Best regards,

   John Bijnens

On 12/03/2015 15:40, Smith, John wrote:

Hi,

As Ron states below, it is possible to make it work but there is no one-stop solution. If you Google security settings for the browser/platform you are targetting then you should find loads of info

Ron is spot on too about the videos not being related. Your videos are MP4 and should play fine but there is an ongoing issue with certain browsers, especially Chrome, where a video request is sent multiple times for a single video, often receiving small Partial headers back which then lock and use up all the available browser connections...

You can see from the attached screenshot, while your video on Page 2 of the first LO loads fine, 6x requests are sent with the first 4 being small. It's still unclear why this happens but again it is a browser thing that has made it's way into  multiple browser and platforms... you can try increasing the number of connections on some platforms but on other platforms this may not be possible...

Regards,

John Smith | Learning Technologist
Room A250, Govan Mbeki Building | School of Health & Life Sciences | Glasgow Caledonian University Cowcaddens Road | Glasgow | G4 0BA

Please address ALL support requests to hlsblt at gcu.ac.uk<mailto:hlsblt at gcu.ac.uk> where one of the School Learning Technologists will pick up the job. This will ensure that all jobs are completed as promptly as possible.
________________________________________
From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk> [xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>] On Behalf Of Ron Mitchell [ronm at mitchellmedia.co.uk<mailto:ronm at mitchellmedia.co.uk>]
Sent: 12 March 2015 12:48
To: 'Xerte discussion list'
Subject: [Xerte] Re: The project data has not loaded.

There are two or three separate issues here...

1. I don't think the issue with your videos not playing locally is security related but could be wrong.

2. At the moment viewing Xerte LO's locally on a desktop or laptop does vary by OS, Browser version and settings. e.g. on my Win 7 laptop IE 10 and Firefox both work but IE prompts to allow blocked content first. The most reliable way to do this on laptops/desktops is to run a small local webserver and view the LO's via localhost. Doesn't have to be xampp which is overkill for just viewing - there are other smaller webservers like quickphp and others. You can then get local playback working via any browser but I'm not sure if there's a similar loacl webserver solution for tablets.

3. Offline on Android tablets and iPads does work but the solutions vary for each and again I'm sure vary by make, model, version of the device and browser etc etc.

I spent a lot of time testing all this previously and trying different solutions on iPads, Android and Windows tablets and got offline working on each but the comibinations varied for each and I simply haven't had time to revisit and test more widely and then document and unfortunately don't at the moment either.

Ron

-----Original Message-----
From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 12:31
To: JohnBijnens1 at gmail.com<mailto:JohnBijnens1 at gmail.com>; Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Thanks everyone for your help with this.

I've had a look at the settings in Chrome and can't see anything obviously available. Any further help would be greatly appreciated as this is starting to get beyond my capabilities. Where would I do what John (chrome.exe
--disable-web-security) is suggesting, for example?

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation Unit
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

-----Original Message-----
From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of John Bijnens
Sent: 12 March 2015 12:19
To: xerte at lists.nottingham.ac.uk<mailto:xerte at lists.nottingham.ac.uk>
Subject: [Xerte] Re: The project data has not loaded.

You could try something like

     chrome.exe --disable-web-security

Best regards,

    John Bijnens

On 12/03/2015 13:07, Oliver Haslam wrote:

Does this mean it's not possible to play Xerte LOs offline?

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation Unit
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

-----Original Message-----
From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Smith, John
Sent: 12 March 2015 12:02
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Just to clarify, this isn't a Xerte issue... this would happen with any

software producing an offline html5/xml package... it is a browser security feature...

Regards,

John Smith | Learning Technologist
Room A250, Govan Mbeki Building | School of Health & Life Sciences | Glasgow Caledonian University Cowcaddens Road | Glasgow | G4 0BA

Please address ALL support requests to hlsblt at gcu.ac.uk<mailto:hlsblt at gcu.ac.uk> where one of the

School Learning Technologists will pick up the job. This will ensure that all jobs are completed as promptly as possible.

________________________________________
From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>
[xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>] On Behalf Of Oliver Haslam [Oliver.Haslam at uwe.ac.uk<mailto:Oliver.Haslam at uwe.ac.uk>]
Sent: 12 March 2015 11:55
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Yes, template.xml is fine in the validator.

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

From: xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk>
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 12 March 2015 11:54
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

The template.xml file. But I don't think that is the problem. I think it

is browser security as they work online.

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 11:53
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

What xml files do I run through the validator?

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 12 March 2015 11:44
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Have you ran the xml through an xml validator?

I've found this very useful on occasion:
http://www.w3schools.com/xml/xml_validator.asp

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 11:43
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Not a feature that I can see. On the tablet I get 'project data has not

loaded' in Opera, Chrome and the built in browser - only FF will load the LO.

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 12 March 2015 11:34
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Is this a browser security 'feature'?

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 11:33
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

They're fine when played from a webserver. But they need to play locally

on machines which don't have internet connections i.e. tablet computers in locations with no wifi available. With Firefox on a tablet the LOs will load only the first two videos will play, other browsers get the 'project data has not loaded' message.

Played locally on a desktop I get this message in Chrome:
[cid:image001.png at 01D05CBB.60391DA0]

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 12 March 2015 11:18
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

All looks good to me.

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 11:16
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

Sorry - I think that may be because access to our xerte server is blocked

to users off-campus.

Can you play the LOs from here instead:
http://fet.uwe.ac.uk/liu/Shear_box_NEW_TEST/index.htm
http://fet.uwe.ac.uk/liu/Using_the_Heliodon_v3/index.htm

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 12 March 2015 11:01
To: Xerte discussion list
Subject: [Xerte] Re: The project data has not loaded.

There is a problem, I'm not sure it is xerte related:

[cid:image002.png at 01D05CBB.60391DA0]

From:
xerte-bounces at lists.nottingham.ac.uk<mailto:xerte-bounces at lists.nottingham.ac.uk><mailto:xerte-bounces at lists.nottin
gham.ac.uk><mailto:xerte-bounces at lists.nottingham.ac.uk> [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Oliver Haslam
Sent: 12 March 2015 10:54
To: xerte at lists.nottingham.ac.uk<mailto:xerte at lists.nottingham.ac.uk><mailto:xerte at lists.nottingham.ac.uk><mailto:xerte at lists.nottingham.ac.uk>
Subject: [Xerte] The project data has not loaded.

Hi

When I try to play LOs in any browser other than Firefox (using the

downloaded deployment zip) I get a message in the browser saying "The project data has not loaded." This occurs on desktop machines and the Android tablets I ultimately want to deploy the LOs on.

I'm happy just to use Firefox on the tablet, the problem (which may be

related?) is that only the first two videos chosen (whichever two I choose of the four available, it doesn't matter) will play. Subsequent videos just hang and when I return to the videos that worked a moment earlier they hang too.

These are the LOs I'm working on:
https://xerte.uwe.ac.uk/play.php?template_id=314
https://xerte.uwe.ac.uk/play.php?template_id=303

Any suggestions?

Thanks
Oli

_____________________________
Oliver Haslam
Learning Technologist
Learning Innovation
Unit<https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx><https://share.uwe.ac.uk/sites/fet/liu/Pages/Home.aspx>
Faculty of Environment & Technology
University of the West of England

0117 32 88215
_____________________________

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