Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 0

[Yuji]

Hi!
I'm testing my site until I received the following error:
"Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 0"

The error started to appear when I put my RadGrid(sortable) inside a Radpanel and put a Radloading panel. The error appears whenever I try to click any navigation button while the RadLoading panel is loading.
Can anyone tell what does this error means, what its cause, and how to fix it?

Thanks!

[Pavlina]

Hello,

I followed your scenario in order to replicate the issue but to no avail.
Please find attached a simple runnable project that demonstrates the desired functionality and let me know if it works as expected.

All the best,
Pavlina
the Telerik team

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[Basel Nimer]

I am getting the exact error only on Chrome and Safari, when using RadAjaxPanel

I tried to trace this, but it happens exactly after i set the onclick property of a button inside the RadAjaxPanel.

any help?

[Pavlina]

Hello Basel ,

Could you please confirm that you managed to replicate this error in the project I sent you in the previous post?

Best wishes,
Pavlina
the Telerik team

[Basel Nimer]

Ah, 

I am not the initial poster

anyhow, i thought that the code will not be useful in my case since i am not using a Grid.

i will check it

[Basel Nimer]

I forgot to mention that this happens only on Chrome.

[Pavlina]

Hello Basel,

Please examine the attached project that is working as expected and let me know what is the difference in your scenario.

Regards,
Pavlina
the Telerik team

[Samson Simon]

Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server is showing 12152, 500, 303 etc. most often its 12152

[Pavlina]

Hi Samson,

I am not sure where the exact source of the issue is. However I suggest you utilize the troubleshooting tips from this documentation topic to track it down.

Kind regards,
Pavlina
the Telerik team

[Samson Simon]

I tried all but still have the same problem.
when i execute the application from VS or on the IIS in my development machine (windows 7), i dont get the error. but on the production server window 2003 IIS 7 i get the error.

[Pavlina]

Hello Samson,

I suggest that you also examine the blog post below as it can help you identify the reason for the erroneous behavior and how to address it.
http://blogs.telerik.com/atanaskorchev/posts/08-07-18/web_resources_demystified_part_3_troubleshooting.aspx

Greetings,
Pavlina
the Telerik team