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Assume that you run Multidimensional Expressions (MDX) query in Microsoft SQL Server 2012 Analysis Services (SSAS 2012). There is a user-defined hierarchy with unary operators. The unary operators are on members of level+1, and the attribute hierarchy has only one level (the IsAggregatable property is set to False). In this situation, you receive the following error message:

Internal error: An unexpected error occurred.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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