FIX: In SQL Server 2008, the IntelliSense feature may become unavailable when you type Transact-SQL statements in the Query Editor in SQL Server Management Studio
Dec.26, 2009 in
exception
Symptoms
In Microsoft SQL Server 2008, you enable the IntelliSense feature in the Query Editor in SQL Server Management Studio. When you type Transact-SQL statements in the Query Editor, the IntelliSense feature may become unavailable, and you do not receive an error message.
Resolution
This problem occurs because of an invalid statement in the Query Editor. When the database engine parses the statement, the database engine throws a System.FormatException exception. This exception stops the IntelliSense feature.

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