sp_xml_removedocument not returning 0

Hello,

When i use sp_xml_removedocument passing the document handle, it shud return '0' when the document is removed from the memory. But in my case, its returning a value of '1'. Please let me know the reason behind returning a value of 1 instead of 0.
Find below the source code i have used inside the Stored Procedure.

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CREATE PROCEDURE UpdateLocation AS
DECLARE @idoc int
DECLARE @doc varchar(1000)
SET @doc ='
<root>
<PKG PkgID="1" DateToBeArchivedPS="01022002">
<FILE FileName="AIP01_1.bin" LocType="FilePath"></FILE>
</PKG>
<PKG PkgID="2" DateToBeArchivedPS="01022003">
<FILE FileName="AIP02_2.bin" LocType="FilePath"></FILE>
</PKG>
<PKG PkgID="3" DateToBeArchivedPS="01022004">
<FILE FileName="AIP01_3.bin" LocType="FilePath"></FILE>
</PKG>
<PKG PkgID="4" DateToBeArchivedPS="01022005">
<FILE FileName="AIP02_4.bin" LocType="FilePath"></FILE>
</PKG>

</root>'

--Create an internal representation of the XML document.
declare @retStatus int

EXEC @retStatus=sp_xml_preparedocument @idoc OUTPUT, @doc

if @retStatus > 0
begin
print 'Prepare Document Failed'
print @retStatus
return 1 --failure
end

-- Execute a SELECT statement that uses the OPENXML rowset provider.

INSERT INTO Location
SELECT * FROM OPENXML(@idoc, '/root/PKG/FILE')
WITH (PkgID char(10) '../@PkgID',
DateToBeArchivedPS char(8) '../@DateToBeArchivedPS',
FileName char(50) '@FileName',
LocType char(50) '@LocType')


EXEC @retStatus=sp_xml_removedocument @idoc

if @retStatus > 0
begin
print 'Remove Document Failed'
print @retStatus
print '@@Error='
set @retStatus=@@ERROR
print @retStatus
return 1 --failure
end

return 0
GO


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Result Set when viewed in Query Analyser

Remove Document Failed
1
@@Error=
0
1

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