[nQSError: 23006] The session variable, NQ_SESSION.S_Budgetary_Control, has no value definition.

Hi All,
I have created a Initialization block named Budgetary_Control
the query entered in the data source is
select
     column
from
     table
where
     user_name=':USER';
then i selected a connection pool and tested with 2 USER
and it gave me expected result.
in the Edit data target i gave a name to this variable as S_Budgetary_Control and a default valus as -1
i checked on row wise initialization test again
it show me multiple record.
the i save the rpd and deployed the same to the server.
now when i trying to create a report using this varriable like VALUEOF(NQ_SESSION.S_Budgetary_Control) it gave me error like
[nQSError: 23006] The session variable, NQ_SESSION.S_Budgetary_Control, has no value definition.
Please help me to get rid of this issue.

set Required for authentication
and followed by Authentication init block as Execution Precedence
~ http://cool-bi.com

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Hi Gurus,
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Hi,
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Hi,
I have gone through other posts relating to this error, but could not find a solution.
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jlw12689 wrote:
> second page
>
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Hi Swami,
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Hi,
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Edited by: user10309945 on Jan 24, 2011 10:08 PM

Sandeep, I found a several topics where users describe saving values in DB through stored procedure or function. For example, [How to store OBIEE presentation level variable values in DB |http://forums.oracle.com/forums/thread.jspa?threadID=892006] I tried it and get an error
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Thanks for your help !
I created a session variable UNAME
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