SYMPTOM:
The following error message is encountered when executing an MDX report against Microsoft SQL Server Analysis Services (SSAS) in Strategy 9.x.

Error: SQL Generation CompleteQueryEngine encountered error: XMLA Execute failed. SOAP Error.
Error type: XMLA error. XMLAError:: Tag mismatch. (...) <Exceptiono xmlns="urn:schemas-microsoft-com-xml-analysis:exception" /><Messages xmlns="urn:schemas-microsoft-com-xml-analysis:exception"><Error ErrorCode="3239837701" Description=" Server. The operation has been cancelled due to memory pressure." Source="Microsoft SQL Server 2008 R2 Analysis Services" HelpFile="" /></Messages> (...)
.. Error in Process method of Component: QueryEngineServer, Project XX, Job ##, Error Code=-2147212544.
"ErrorCode="3239837701"