Error in AML

Hi, Does this query returns item which matches this condition <item_number>@Parameter</item_number> alone ?? I was trying to test it in OOTB, and <item_number>@Parameter</item_number> doesn't have any impact and it return all item of MIN_RMA. // (code2) get rma_no from the relationship of min_rma_parts and min_rma <AML> <Item type=”MIN_RMA” action=”get” select=”rma_no”> <Relationships> <Item type=”MIN_RMA_PARTS” action=”get” select=”related_id”> <item_number>@Parameter</item_number> </Item> </Relationships> </Item> </AML> Could you please help with some more inputs on what you are trying to achieve in this AML.