Data Source View error

Hi!
I am getting following error when I try to open Data Set View or cube or
report:

TITLE: Microsoft SQL Server Management Studio
------------------------------
Property accessor 'Description' on object
'Microsoft.AnalysisServices.DataSourceView' threw the following
exception:'Deserialization failed: Property not accessible because 'Parent
Columns and Child Columns don't have type-matching columns.'.' (System)
------------------------------
ADDITIONAL INFORMATION:
Deserialization failed: Property not accessible because 'Parent Columns and
Child Columns don't have type-matching columns.'. (Microsoft.AnalysisServices)
------------------------------
Property not accessible because 'Parent Columns and Child Columns don't have
type-matching columns.'. (System.Data)
------------------------------

Anyone knows any fix for Data source view?

Thanks,
Sam