Server Exception With ASPX

Question

When I run aspx code through web server I get the following exception. What should I do to fix it ?

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.

Source Error:

Line 9: <system.web>

Line 10:<customErrors mode="Off"/>

Line 11: <compilation debug="true" targetFramework="4.5" />

Line 12:<httpRuntime targetFramework="4.5" />

Line 13: </system.web>

You shouldn't ask the same question over and over.. stackoverflow.com/questions/15449332/server-error-when-aspx-run/… — Magnus Karlsson
– Magnus Karlsson, Commented Mar 16, 2013 at 13:12
@MagnusKarlsson It was not the same question..it was related to CustomError — Vishal Suthar
– Vishal Suthar, Commented Mar 16, 2013 at 13:13

Vishal Suthar · Accepted Answer · 2013-03-16 13:20:42Z

3

It is because of the below cases:

Your Application pool may configured for the .net framework version 2.0.
Or the framework 4.5 may not be installed on your server.

Make sure the framework is registered with the IIS.

Go to "Website" in IIS -> Start Options -> build tab – > Select Target Framework in combo box (.NET FrameWork 4.5)

edited Mar 16, 2013 at 13:20

answered Mar 16, 2013 at 13:15

Vishal Suthar

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Comments

Darin Dimitrov · Accepted Answer · 2013-03-16 13:09:16Z

1

There's no targetFramework attribute for the <httpRuntime> node. You should remove it from your web.config:

<system.web>
    <customErrors mode="Off"/>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime />
</system.web>

Also make sure that you have configured the IIS application pool to use the correct version of the .NET framework.

answered Mar 16, 2013 at 13:09

Darin Dimitrov

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4 Comments

TheChampp Over a year ago

With local host all is fine. I bought server domain and host and I am getting this error there.

Darin Dimitrov Over a year ago

Maybe there's some transformation on your web.config which has been performed on the host and which is invalid. Or maybe your host doesn't support .NET 4.5. In all cases it is clear from the exception stacktrace that you have invalid web.config out there. How this happened is an issue that you should probably discuss with your hosting provider and not on StackOverflow.

TheChampp Over a year ago

I solved it should config to 4.0 from Plesk Control Panel. But with <httpRuntime /> it gives me exception. When I remove it all is fine. What is the point of httpRuntime ? What does <httpRuntime /> do ?

Filip Cornelissen Over a year ago

Wrong Darin, there definitely a targetFramework for httpRuntime: msdn.microsoft.com/en-us/library/…

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