Error loading resource in pages with RadComboBox

[Pascual]

I am working in a asp.net webforms project extending functionalities in an application that makes use of Telerik AJAX controls. The issue is that when I run the code in my laptop (win10Pro) the forms with RadComboBoxes fail. The control is rendered but there is an error in the load (in chrome is reported with the message: "Failed to load resource: the server responded with a status of 500 (Internal Server Error)" and later complains about "Telerik is not defined". If I run the same code in a windows server it works perfectly. I have several forms with telerik controls (grid) that works perfectly in my laptop, so I guess the problem is not related to web.config issues.

The resource request that fail is:

http://localhost/Synergy/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d4.0.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aes-ES%3af9ecfe64-7d94-4875-a470-9996e4d00a9f%3aea597d4b%3ab25378d2%3bTelerik.Web.UI%2c+Version%3d2015.1.401.45%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aes-ES%3a4f93cdea-660e-49e9-b57d-168c603f1b46%3a16e4e7cd%3af7645509%3a24ee1bba%3af46195d3%3a2003d0b8%3ac128760b%3a88144a7a%3a1e771326%3aaa288e2d%3a258f1c72%3a6d43f6d9%3aed16cbdc%3a4c8be21a%3a874f8ea2%3a650fdad%3aa960fda2%3aca44ff11%3a29e4ab07%3ab68dcd79%3ae330518b%3ac8618e41%3ae4f8f289%3a1a73651d%3a333f8d94%3a19620875%3acda80b3%3a383e4ce8

In the event viewer there is a recorded event:

Error HTTP 500.21 - Internal Server Error

Handler "TelerikResource" has a bad module "ManagedPipelineHandler" in its module list.

The error code is 0x8007000d

Any help with this issue?

 

[Nencho]

Hello,

Please refer to the following help article for common causes for this problem:

http://www.telerik.com/help/aspnet-ajax/introduction-troubleshooting.html

If you still receive the error, please send us a support ticket with a sample project that demonstrates the problem, so that we can test it locally and investigate the reason for the problem.

Regards,
Nencho
Telerik by Progress

[Pascual]

Hi,

I finally solved the problem changing the app pool pipeline mode from "classic" to "integrated" and migrating de configuration. I don't know the source of the issue.I think it's not a web.config issue because other pages in the same app load the resource perfectly. Look's like the handler has a problem with the request when there is a RadComboBox in the page.

Thanks for answer anyway

Regards,

Pascual