Excel, PowerView error in SharePoint 2013: "An error occurred while loading the model for the item or data source 'EntityDataSource'. Verify that the connection information is correct and that you have permissions to access the data source."

Question

I've installed SQL Server 2012 SP1 + SP server 2012 + SSRS and PowerPivot add-in.
I also configured excel services correctly. Everything works fine but the powerview doesn't work!
While I open an excel workbook consist of a PowerView report an error occurs: "An error occurred while loading the model for the item or data source 'EntityDataSource'. Verify that the connection information is correct and that you have permissions
to access the data source."
error detail: 
<detail><ErrorCode xmlns="http://www.microsoft.com/sql/reportingservices">rsCannotRetrieveModel</ErrorCode><HttpStatus xmlns="http://www.microsoft.com/sql/reportingservices">400</HttpStatus><Message xmlns="http://www.microsoft.com/sql/reportingservices">An
error occurred while loading the model for the item or data source 'EntityDataSource'. Verify that the connection information is correct and that you have permissions to access the data source.</Message><HelpLink xmlns="http://www.microsoft.com/sql/reportingservices">http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsCannotRetrieveModel&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=11.0.3128.0</HelpLink><ProductName
xmlns="http://www.microsoft.com/sql/reportingservices">Microsoft SQL Server Reporting Services</ProductName><ProductVersion xmlns="http://www.microsoft.com/sql/reportingservices">11.0.3128.0</ProductVersion><ProductLocaleId
xmlns="http://www.microsoft.com/sql/reportingservices">127</ProductLocaleId><OperatingSystem xmlns="http://www.microsoft.com/sql/reportingservices">OsIndependent</OperatingSystem><CountryLocaleId xmlns="http://www.microsoft.com/sql/reportingservices">1033</CountryLocaleId><MoreInformation
xmlns="http://www.microsoft.com/sql/reportingservices"><Source>ReportingServicesLibrary</Source><Message msrs:ErrorCode="rsCannotRetrieveModel" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsCannotRetrieveModel&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=11.0.3128.0"
xmlns:msrs="http://www.microsoft.com/sql/reportingservices">An error occurred while loading the model for the item or data source 'EntityDataSource'. Verify that the connection information is correct and that you have permissions to access the
data source.</Message><MoreInformation><Source>Microsoft.ReportingServices.ProcessingCore</Source><Message msrs:ErrorCode="rsErrorOpeningConnection" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsErrorOpeningConnection&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=11.0.3128.0"
xmlns:msrs="http://www.microsoft.com/sql/reportingservices">Cannot create a connection to data source 'EntityDataSource'.</Message><MoreInformation><Source></Source><Message>For more information about this error navigate
to the report server on the local server machine, or enable remote errors</Message></MoreInformation></MoreInformation></MoreInformation><Warnings xmlns="http://www.microsoft.com/sql/reportingservices" /></detail>
Please help me to solve this issue. I don't know if uploading the excel workbook is enough or maybe It needed to connect to another data source.
I Appreciate in advance.

Answer 1

Hi Ali.y,
Based on the current error message, the error can be related to the
Claims to Windows Token Service (C2WTS) and is an expected error under certain conditions. To verify the issue, please check the aspects below:
     1. The C2WTS Windows service and C2WTS SharePoint service are both running.
     2. Check the SQL Server Browser service is running on the machine that has the PowerPivot instance of SSAS.
     3. Check the domain. You're signing into SharePoint with a user account in some domain (call it Domain A).  When Domain A is equal to Domain B which SharePoint server itself is located (they're the same domain), or Domain
A trusts Domain B.
In addition, the error may be caused by Kerberos authentication issue due to missing SPN. In order to make the Kerberos authentication work, you need to configure the Analysis Services to run under a domain account, and register the SPNs for the Analysis
Services server.
To create the SPN for the Analysis Services server that is running under a domain account, run the following commands at a command prompt:
• Setspn.exe -S MSOLAPSvc.3/Fully_Qualified_domainName OLAP_Service_Startup_Account
Note: Fully_Qualified_domainName is a placeholder for the FQDN.
• Setspn.exe -S MSOLAPSvc.3/serverHostName OLAP_Service_Startup_Account
For more information, please see:
How to configure SQL Reporting Services 2012 in SharePoint Server 2010 / 2013 for Kerberos authentication
Regards,
Heidi Duan
Heidi Duan
TechNet Community Support