The fix also applies to Microsoft SQL Server 2014 Analysis Services (SSAS 2014).
Symptoms
When you execute a Process command (such as a ProcessFull or ProcessAdd command) against a partitioned table in a Microsoft SQL Server 2012 Analysis Services (SSAS 2012) or SQL Server 2014 Analysis Services (SSAS 2014) instance that is running in Tabular mode, you may receive the following error:
Note
An unexpected error occurred (file 'xmcompanalyzer.cpp', line 553, function 'XMCompressionAnalyzer::SelectBitPackCompression'). The current operation was cancelled because another operation in the transaction failed.
Resolution
The issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 1 for SQL Server 2014 /en-us/help/2931693
Cumulative Update 6 for SQL Server 2012 SP1 /en-us/help/2874879
About cumulative updates for SQL Server
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.
Workaround
To work around the issue, perform a Process Defrag command against the table that has the issue.