'Sys is not defined' JavaScript error

I've exhausted all my efforts searching for a solution online, but I'm still struggling to find an answer.

I am facing a challenge with several projects that were initially developed for .Net 2.0 and hosted on IIS6 Server 2003 32 bit. Now, as part of the migration process, they need to be moved to IIS7 Server 2008 64 bit (both of which are unfamiliar territories for me). The problem arises post-migration where any page utilizing .Net AJAX encounters an 'Sys is undefined error'. Upon inspecting the source code, attempting to access any *.axd file results in a 404 error.

I have meticulously verified that my web.config includes all the necessary sections, with the "Version" attributes consistently set to 1.0.61025.0, given that I am not upgrading from .Net 2.0 at this moment. Furthermore, the Virtual Directories have been configured as applications, and the App Pool is configured to run on .Net 2.0 Integrated mode.

Ensuring that the *_AppService.axd and ScriptResource.axd mappings are in place and properly configured under *.axd Handler Mappings has also been completed. Additionally, I have made it a point not to include any custom javascript references to Sys.

Attempts such as repairing/reinstalling .Net on the server and running aspnet_regiis through the command line have already been made without success.

I even tried creating "empty" WebResource.axd and ScriptResource.axd files within the project. While this action eliminates the 'Sys is undefined' error, it unfortunately disrupts the functionality on pages that rely on these files.

Are there other options available to resolve this issue? Have I overlooked something critical or could I have misstepped during the actions I've taken so far? Any guidance or assistance you can provide would be greatly appreciated. Thank you!

javascriptasp.netajax

Answer №1

After removing the mapping for ScriptResource.axd, my issue was successfully resolved.

Additionally, we implemented the following configuration at that time:

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true"></modules>
</system.webServer>

I hope this information proves to be helpful for you! 😊

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