That is the entire error message. I'm getting it as well:

Query:

Select Non Empty [Measures].[Admissions Actual] on columns,

[Patient].[Patient ID].Members on Rows

From [Gentiva DW]

Where ([Business Unit].[Cost Center].&[0075],[Date].[Calendar].[Year].&[2012])

Entire Messages:

Executing the query ...

Exception of type 'System.OutOfMemoryException' was thrown.

Execution complete