After 6 hours I give up. I installed SQL Server 2012 Service pack 1. I ran the PowerPivot for Sharepoint and everything went well. The PowerPivot Management Dashboard comes up, the solutions is available at the Farm level and I also have it enabled on the site collection level. Analysis services seems to be installed and working. I have my server listed in the Excel Application Service and everything "looks" right. However I cannot get the PowerPivot timeline (data refresh) to work. I just get"PivotTable Operation Failed: An error occurred while working on the Data Model in the workbook. Please try again."
I am at my wits end and I have no idea what else to even check. The Secure Store service seems right and I have tried setting the Connection Settings in the Excel doc itself with the AppId thats in the secure store and to no avail.
ULS Logs show this
ConnectionManager.GetModelConnection: Invalid connection info: [Oledb, Stored, PowerPivotUnattendedAccount, False, , ShouldUseEffectiveUsername: False]
DataModelManager.GetModelAndMarkUsed: failed to create connection, ex: Microsoft.Office.Excel.Server.CalculationServer.Interop.ConnectionException: Exception of type 'Microsoft.Office.Excel.Server.CalculationServer.Interop.ConnectionException' was thrown.
at Microsoft.Office.Excel.Server.CalculationServer.ConnectionManager.GetModelConnection(ConnectionInfo connectionInfo, Credentials credentials, Uri workbookUri, Int32 lcid, WorkbookInterop workbookInterop, Guid itemId, Boolean writableLegacy)
at Microsoft.Office.Excel.Server.CalculationServer.DataModelManager.GetModelAndMarkUsed(ConnectionInfo connectionInfo, Credentials credentials, Int32 lcid)
PF_CHECK_ERROR returned 'critical hresult error' 0x80004005 ; Stack Trace:NA
CWorkbook::_HandleModelStreamingError - powerpivot operation failed with 0x80004005
CExcelDataObject::MapServerAlert called - stridAlert==6DA
Please help....if you can =)