I just spent the day figuring out why my ScriptResources.axd file wasn't being rendered and thus causing the "Sys is undefined" message in IE.  My problem had to do with inheriting from a custom base class (which in turn inherited from System.Web.UI.Page).  The "OnPreRenderComplete" event was being overridden but it wasn't making a call to "base.OnPreRenderComplete(e)."  Once I put the call to the base event on "Page", the ScriptResources.axd file was being output correctly.

This was tricky, we're using a master page with the content pages using lots of custom user controls.  The user controls contain the Ajax enabled components.

I am having this same "sys is not defined" problem implementing into DotNetNuke 4.4.0  ... It works fine locally running windows 2003, but is giving me the page error when used on the windows 2003 production server.  The only difference i can see is that VS.NET is not installed on the production server.

Update:  I just checked and it appears that in DotNetNuke, although the base system.web.ui.page class is inherited into DotNetNuke.Framework.PageBase, we do not override the base OnPreRenderComplete function, so i do not think that is the problem.  I can see in view source that there is script trying to access the Sys namespace, but I am not sure what to be looking for to affirm that the asp.net ajax is loading, other than the error is still there.  I have added the web.config changes as mentioned, and it works without error locally...

hmm

Cheers

I am still having this problem on server 2003 / .net /w ajax 1.  the files are in the gac, the web.config is correct.  works fine on my local box, but not production.  only difference is that prod does not have vs.net installed.  can anyone else help PLEASE? this is really frustrating!

What else is required to implement this.... Bueller??

You can see it at www.tagplace.net and view source....

Hello,

And if you turn off ViewState?

Second,

I had this strange thing suddenly..
http://forums.asp.net/thread/1566064.aspx

Maybe your time setting of your server?

Both a shot in the dark, because sys is undefined can have lots (and lots) of causes.
Most of them are allready mentioned here and on the forum, but you never know..

Marchu

This is my experience with this issue:

When browser requested ScriptResource.axd it was returning a 404 not found error and it was being caused by a bad configuration on my web application with isapi mappings. The site where I found the solution explained it as follows:

 ------------------------------------------------------------------------------------------------------------

If you try what is outlined in the obnoxiously yellow post (nothing personal errick) and you are getting a blank page, I highly recommend doing the uncomment in the web.config someone mentioned earlier in this thread. It was something like:

<system.web.extensions>

<scripting>

<scriptResourceHandler enableCompression="false" enableCaching="true" />

</scripting>

</system.web.extensions>

this is now FIXED by uncommenting and turning off compression in the web.config setting:

thecrispy1:

If you try what is outlined in the obnoxiously yellow post (nothing personal errick) and you are getting a blank page, I highly recommend doing the uncomment in the web.config someone mentioned earlier in this thread. It was something like:

<system.web.extensions>

<scripting>

<scriptResourceHandler enableCompression="false" enableCaching="true" />

</scripting>

</system.web.extensions>

That wasn't my problem since I had that uncommented from the beggining. My problem was that browser requested ScriptResource.axd and it always returned a 404 Error due to the "Verify that file exists" option being enabled in my ISAPI wildcard mapping

None of this is working for me, I have a host.

 Everything was great until you guys decided to put it in the GAC

 How about making that optional.  I love it when MS decides how I should run my code.

ScottG said this was done for 'windows update' reasons   - well, that is another mess of crap.  Perhaps I don't want Windows Update clobbering my code as well.

So... I still get this error and I have no fix for it - I had a great site running, now it's hosed.

hello,

I have this 'Sys Undefined' error when i access the website after deploying in our test Server (Windows 2003 Server running IIS6). I have done all the changes mentioned in this thread plus some of the suggesstion metioned in the google search. Problem still exists.

1. No problem in the VS2005 dev enviroment. AJAX extended control works fine. 

2. But got problem after deploying the web app in the test server with windows 2003 server with IIS6. AJAX extender control is not working now and i get the 'Sys' undefined error message. The browser i use to access the web app is IE6-sp1.

Any help would be appreciated.

Thanks. 

Whooooooooooooo......

Got my above problem resolved!!!!!!

The problem is in configuring IIS6 for your web site.

In the application configuration for your website, make sure the "Verify file exist" oiption is disabled for .axd. Just made this only change and boom got my AJAX control working like a charm...

Now iam a happy camper.!!!!!!!!!!!!!

-Suresh.

It seems that the "Sys not found" problem seems to be caused generically by IIIS being unable to load the AXD file.

 I have just upgraded to IIS7/Vista, and an existing website under my old OS (XP) will not run any AJAX app due to the "Sys not found".

Initially it wouldn't run any ASP.Net 2.0 app, until I discovered that the applicationHost.config file was missing entries for some ASP.Net 2.0 mappings for ASPX files.  I wonder if it's also missing entries for AXD files.

 I tried copying an entry for the 1.1 AXD mapping and adjusting it to point to 2.0 framework, but that didn't change anything.

<add name="ASPNET-ISAPI-2.0-AXD" path="*.axd" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.Net\Framework\v2.0.50727\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv1.1,bitness32" responseBufferLimit="0" />

 I also notice that if I look at the browser source for an AJAX website that works (any public ajax website) and you copy the relative URL for the any included AXD file and paste it into the browser, it loads that AXD file.  But on my dev server, if I do the same, I get a 404 error.

Some configuration setting is missing to support loading these AXD files into the browser.

 Hi,
I was having this issue on Windows Vista + IIS7 and AJAX 1.0.
In web.config under system.webServer/handlers I had te following entry:

but then I changed it and added preCondition="integratedMode" like so:

 <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

And it works!