SSRS 2012 - Windows Server 2012 R2 issue with OLEDB Connection String

Question

Hoping someone can help. As stated above, we are running SQL Server 2012 with SP1 on Windows Server 2012 R2. When I create a Data Source as follows in Reporting Services, I receive the following error message. Any thoughts on why this fails? The same data
source works on Windows Server 2008 R2 Enterprise SQL Server 2008 R2. 
Data Source type: OLE DB
Connection string: Provider=Microsoft.ACE.OLEDB.12.0;Data Source="\\networknamehere\CSVFiles";Mode=Read;Extended Properties="text;HDR=YES;FMT=CSVDelimited"
ERROR: Throwing Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: , Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Cannot create a connection to data source 'CSV_Datasource'. ---> System.Data.OleDb.OleDbException:
Unspecified error
   at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)
   at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)
   at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.OleDb.OleDbConnection.Open()
   at Microsoft.ReportingServices.DataExtensions.ConnectionExtension.Open()
   at Microsoft.ReportingServices.Diagnostics.DataExtensionConnectionBase.OpenConnection(IProcessingDataSource dataSourceObj, DataSourceInfo dataSourceInfo, IDbConnection conn)
   --- End of inner exception stack trace ---;

Answer 1

Hi ABAA101,
According to your description, when you use csv file as data source in SSRS 2012 report, you got the error message.
I tested the issue in my local machine, due to some policy restrictions, I could not install Access in my local machine. To workaround the issue, we can use the connection string like below:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\report;
Extended Properties="text;HDR=Yes;FMT=Delimited"
The csv file is stored in report folder in C driver.
In Query text box in the dataset, we can use the query like below:
Select * from new.csv
If you have any more questions, please feel free to ask.
Thanks,
Wendy Fu
Wendy Fu
TechNet Community Support