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You can find a lot of debugging and deploying problems while developing applications in .NET and Visual Basic here. There are also some querying tips in SQL and typical source codes which might be useful shared here.

CustomError mode

Error :

Server Error in '/' Application.
Runtime Error
Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".

<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customerrors> configuration tag to point to a custom error page URL.

<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
</configuration>

Solution : The exact error hidden in this error message may vary. To reveal and see the error, changing the customErrors mode is necessary.
In web.config, change to mode to RemoteOnly or Off.
Changing the mode to RemoteOnly will enable the error message to be displayed when the web is viewed on the server.
Meanwhile, changing the mode to Off will enable the error message to be displayed when the web is viewed either on the server of outside.


<customErrors mode="Off" defaultRedirect="ErrorPage.aspx">
<error statusCode="404" redirect="ErrorPage.aspx?errNo=404"/>
</customErrors>
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