When you run some Multidimensional Expressions (MDX) queries or Data Analysis Expressions (DAX) queries through the In-memory Business Intelligence (IMBI) services in Microsoft SQL Server 2012 Analysis Services (SSAS 2012) or SQL Server 2014 Analysis Services (SSAS 2014), you may receive one or more of the following error messages:
Message: An error was encountered during the evaluation of the row level security expression. Role: 'User Security'. User: 'Domain\UseName'. Table: 'TableName'.
Error message: An error was encountered during the evaluation of the row level security expression defined on table 'TableName'.
Error message: The operation was cancelled by the user.