Symptoms
Consider the following scenario:
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You use Microsoft SQL Server 2012 Analysis Services (SSAS 2012) or SSAS 2014 in a multidimensional model.
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You create a Power View report in SharePoint 2013.
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You try to select more than one hierarchy from a parent/child dimension that uses naming template, and at least one level name of the parent/child hierarchy naming template is identical to the name of an existing attribute hierarchy in the same dimension.
In this scenario, you cannot select the second hierarchy, and you receive the following exception:
Microsoft.Reporting.QueryDesign.ExpressionTrees.Translators.Internal.DaxTranslationException: DaxExpression specifies duplicate columns. Table expression columns must be unique. at Microsoft.Reporting.QueryDesign.ExpressionTrees.Translators.Internal.DaxExpression..ctor(String text, IList`1 resultColumns) at Microsoft.Reporting.QueryDesign.ExpressionTrees.Translators.Internal.DaxExpression.Table(String text, IList`1 resultColumns) at Microsoft.Reporting.QueryDesign.ExpressionTrees.Translators.Internal.DaxTransform.Visit(QueryScanExpression expression) at Microsoft.Reporting.QueryDesign.ExpressionTrees.Internal.QueryScanExpression.Accept[TResultType](QueryExpressionVisitor`1 visitor) at Microsoft.Reporting.QueryDesign.ExpressionTrees.Translators.Internal.DaxTransform.EvaluateInScope[TResult](QueryExpressionBindingBase input, Func`2 tableScopedFunc, Boolean wrapInputTableInKeepFilters)
Resolution
The issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 5 for SQL Server 2014 /en-us/help/3011055
Cumulative Update 3 for SQL Server 2012 SP2 /en-us/help/3002049
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:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
