There is an issue in one of the components of IE6 that prevents it from loading compressed scripts correctly. See KB article here. How do you fix it? That alone should be enough. You can also try turning off compression by editing your web. Make sure your web. This usually points to a mis-configuration of ASP. NET as a whole. On a default installation of ASP. NET, any web request to a resource ending in.
NET via an isapi mapping. Additionally the mapping is configured to not check if the file exists. If that mapping does not exist, or the check if file exists isn't disabled, then IIS will attempt to find the physical file ScriptResource.
How do you fix this? If ASP. In addition to ensuring you have the ScriptManager on your page you need to ensure that your web. When ASP. I hate adding to such a huge topic and so much later, but I've think I have a solution that work in VS at the very least. When working on a asp. There was probably a script in your page that was using the Sys function.
All you have to do is add a reference. Usually CDNs are added via a script resource:. Make sure that any client scripts you have that interact with. This tells the script manager that the whole script file has loaded and that it can begin to call client methods. I was having this same issue and after much wrangling I decided to try and isolate the problem and simply load the script manager in an empty page which still resulted in this same error.
Having isolated the problem I discovered through a comparison of my site's web. Click here for a description of this issue. I solved this problem by creating separate asp. In case none of the above works for you, and you happen to be overriding OnPreRenderComplete, make sure you call base.
My therapist is going to be happy to see me back. I had the same problem after updating my AjaxControlToolkit. I've searched and came up to this page, but none of the answers help me. I did so and there is no Sys. Extended is undefined any more. In my case the problem was that I had putted the following code to keep the gridview tableheader after partial postback:. Was having a similar issue, except that my page was consistently generating the Sys is undefined error.
And figured it was my web. I just updated that web. I have been seeing the exact same error today, but it was not a config or direct JavaScript issue. An external. My presumption is that ASP. NET ajax was not able to construct the client representations of the.
NET objects properly and so was failing to load correctly. To resolve, I rebuilt the external project s , and rebuilt my solution that was experiencing issues. The problem went away. I had similar problems and to my surprise what I found that one of my developer had saved web.
As soon as I deleted the web The page in question had a scriptmanager to create the connection to a wcf service. I added an extra method to the service and this error started appearing. What fixed it for me was changing from 'Auto-assign Port' to 'Specific port' with a different port number in the oroject Web settings.
If all the web. Net 4. In my situation i had implemented Page Routing which was ghosting my problem. Basically it would work for about 20, or so, debug runs and then BAM would error out with the Sys is undefined error. After reviewing a couple other posts, that got to talking about the Clean-URL logic, i remembered that i had done PageRouting setup's. Here is the resource i used to build my patterns: Page Routing. Even after adding the correct entry for web config still getting this error? Then most obvious fix would be move the java script block below the ScriptManager control:.
I don't think this point has been added and since I just spent some time hunting this down I hope it can help. NET v4 Framework. In my case it was important that an entry be added to both the and section of the entry in the web. My web. All it has is the script manager and it gives me the same error. What i did notice is that in the error list it says "could not find schema information for the attribute 'preCondition'. This error is given for a number of other elements including system.
I use. NET 3. Everything seems to work for me. Ask a question. Quick access. Search related threads. Seems like a lot of folks have had this similar problem, but none of the solutions I have seen so far have fixed my issue. The webpage is being hosted on a godaddy IIS vs 7 server. The ajax on the page runs just fine when being viewed in Firefox.
However, when trying to view the page in IE7, I get the 'Sys' is undefined error. The webpage does view correctly in IE7 when hosted from my local machine via the virtual server provided by visual studio. Attached is my web. A Sys undefined problem that's inconsistent between browsers is not going to be web.
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