Formatted Search

Hi,

Iam making use of a simple formatted Search query , But its pops out error(8180).

Query am using is:

SELECT T0.ItemCode FROM OSCN T0 WHERE T0.ItemCode = $[$4.0.0]

I tried changing my query as

SELECT T0.ItemCode FROM OSCN T0 WHERE T0.ItemCode = $[ORDR.CardCode]

Error 8180 is shown here too.CAn somebody please help me out

Thanks

Mini