Assume that you have a role that has cell security defined in Microsoft SQL Server 2012 Analysis Services (SSAS 2012) or SQL Server 2014 Analysis Services (SSAS 2014) database. When you try to use one member of this role to perform writeback action on one of the cells that is limited by the cell security, SSAS instance may crash.
Note Non-trivial cell security is defined on this cell.
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.