Some rows are not displayed when you create a model-based report in SQL Server 2005 Reporting Services (917421)

CAUSE

The problem occurs because the report model data extension returns primary key values as Base64-encoded strings that may differ only by case. At the same time, report processing is instructed to ignore case when it processes the results. Because their grouping values are considered equal, some rows are collapsed together by report processing.

The problem does not affect aggregates that are computed by the report model data extension or by report processing, except if the RDL CountDistinct function is applied to a primary key value. Report Builder will never generate this kind of expression. However, you may manually generate this kind of expression when you create a model-based report in Microsoft Visual Studio 2005. In this case, the CountDistinct function may generate an incorrect result.