vb.net - 企业库 v5 异常

Question

通过企业库 v5 执行查询时出现以下异常。

SqlCommand.DeriveParameters failed because the SqlCommand.CommandText property value is an invalid multipart name "SELECT QUERY", the current limit of "4" is insufficient.

代码：

Try
   Dim db As Database = DatabaseFactory.CreateDatabase("DatabaseName")
   reader = db.ExecuteReader(CommandType.Text, query)
Catch ex As Exception
   Throw ex
End Try

该代码块运行良好，直到昨天。突然，这个错误出现在日志中。