Problem with report with filter from other query

Question

Hi All,
I have some report with two queries:
1. First contain Date(1) converted to int (like 20140807). This query calculate Date as getdate minus number of day which I could define (for example -8 return getdate minus 8 days).
2. The second contain also Date(2) converted to int. I would like to add filter where Date(2) will be on the list from results in query 1. When I try do this I receive:
Database error: [Microsoft][ODBC SQL Server Driver][SQL Server]Statement(s) could not be prepared.. (IES 10901) (WIS 10901)
When I have changed number of days from -8 to -30 in query 1, query 2 return some records.
I do not know why it work sometimes, sometimes not.

Answer 1

Sathish, but I use defined by me objects (today number + days) and (today number) in BO so I do not want to change it manually.
Arijit, the second query without any filters return records with Date(2) equal 20140715. When I add filter with Date(2) = returned data from query 1 (getdate minus 8 days) I receive error. I know that getdate minus 8 days return dates (20140807...20140801) so 20140715 is out of the range. In this case query should return blank page.
When I change query 1 from 8 to 30 days is working correctly because 20140715 is in this range. Maybe it help to help me
This is condition from query1:
WHERE
  dbo_Date.DateID(1)  BETWEEN  year( ( cast(convert(varchar, dateadd(day,@Prompt('Enter the number of X days',  'N',,Mono,Free, Persistent),getdate()) , 102) as datetime) ) )*10000 + month(( cast(convert(varchar, dateadd(day,@Prompt('Enter the number of X days',  'N',,Mono,Free, Persistent),getdate()) , 102) as datetime) ))*100 + day( ( cast(convert(varchar, dateadd(day,@Prompt('Enter the number of X days',  'N',,Mono,Free, Persistent),getdate()) , 102) as datetime) ) )  AND  year( getdate() )*10000 + month(getdate())*100 + day( getdate() )
but I use the same condition in other reports and it is work.