Error In --&&> EXEC Xp_cmdshell 'bcp SELECT * FROM Tbl A Where A.flag=N Queryout F.txt -c -T'

some one can tell if i can make a "where" clause inside the BCP , when i say : select * FROM tbl where flag=N , usually the where flag='N' works with the ' ' , but it gives no error when save the store procedure without it ' ' saves nicely the SP,

but
like this it saves well "SELECT * FROM tbl where flag=N" and
when i execute it, give a sql statement error "Error = [Microsoft][SQL Native Client][SQL Server]Invalid column name N."

i dont now , any help

PS: perhaps at the end of the BCP ---> -c -T , must have some more or less