The fix also applies to Microsoft SQL Server 2014 Analysis Services (SSAS 2014).
When you run a Multidimensional Expressions (MDX) query that uses the Member.Name property against a Microsoft SQL Server 2012 Analysis Services (SSAS 2012) database after you have applied Service Pack 1 (SP1) for SQL Server 2012 or a SQL Server 2014 Analysis Services (SSAS 2014) database for SQL Server 2014, you may receive the following error message:
The following system error occurred: Type mismatch.
The issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 1 for SQL Server 2014 /en-us/help/2931693
Cumulative Update 6 for SQL Server 2012 SP1 /en-us/help/2874879
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
To work around the issue, use the Member.Caption property instead.