Assume that you use a database with compatibility level set to 1200 in Microsoft SQL Server 2016 Analysis Service (SSAS 2016) tabular mode. When you process a table that has calculated columns or calculated tables, you may fail to save your modifications to the server and receive an error message that resembles the following:
"Failed to save modifications to the server. Error returned: 'An unexpected error occurred (file 'tmmdmodeltm.cpp', line LineNumber, function 'MDModelTM::CreateHierIterRequest')."
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.