Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive- SharePoint2010

What is meant by session state? What exactly its functionality? How it works?

Reference: http://msdn.microsoft.com/en-us/library/ms178581%28v=vs.100%29.aspx

Complete Error Message:

Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration>\<system.web>\<httpModules> section in the application configuration.

Before you start your troubleshooting, make sure that the State Service service application is running. How you will check this?

-Open your Central Administration

-Manage service applications

- check the service application by the name ‘state service service application’

What exactly I did to resolve this issue? Please refer the following:

2-step resolution:

Make the enableSessionState is set to true, How?-Please refer below:

<pages enableSessionState="true" enableViewState="true" enableViewStateMac="true" validateRequest="false" pageParserFilterType="Microsoft.SharePoint.ApplicationRuntime.SPPageParserFilter, Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" asyncTimeout="7">

Make sure that the remove and add lines exist in the modules section for Session.

<modules runAllManagedModulesForAllRequests="true">

…

<remove name="Session" />

<add name="Session" type="System.Web.SessionState.SessionStateModule" preCondition="" />

…

modules>

After implementing the above changes, the error should have to go away.

If you have any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you…

Product Applies To:

-SharePoint Server 2010

-SharePoint Foundation 2010

References:

This report failed to load because session state is not turned on" when you try to view Microsoft Access Services reports

http://support.microsoft.com/kb/2419469

State service and session state cmdlets (SharePoint Server 2010)

http://technet.microsoft.com/en-in/library/ee890113(v=office.14).aspx

Manage the State Service (SharePoint Server 2010)

http://technet.microsoft.com/en-us/library/ee704548(v=office.14).aspx