Must declare the scalar variable "@doc"

Question

I searched a lot about this error but nothing seemed similar to what is happening to me, I created a cursor and after fetch next returns me the title error, someone could help?

declare @doc int
,@qnt int
,@estoqueantigo int
,@onhandatt int
,@icode varchar(20)
declare crs cursor
for
select * from #tmpPedidos order by itemcode
open crs
fetch next from crs into @doc,@qnt,@estoqueantigo,@onhandatt,@icode;
      insert into #tmp2(Docentry,qty,onhand,itemcode) values (@doc,@qnt,@onhandatt,@icode)
      update #tmpPedidos set Docentry=Docentry,qty=qty,onhand=@onhandatt,conta=@onhandatt-qty,itemcode=itemcode where itemcode = @icode
close crs
deallocate crs

here there are 2 temporary tables, one to perform the function and the other to receive the results, currently I can only show the first result, I will show the code of the previous parts.

create table #tmpPedidos(
Docentry int
,qty int
,onhand int
,conta int
,itemcode varchar(20)
)
--insere na tabela
insert into #tmpPedidos(Docentry,qty,onhand,conta,itemcode)
(select a.docentry,b.Quantity,c.OnHand,(c.OnHand - b.Quantity),b.ItemCode
from ORDR a 
inner join RDR1 b on a.DocEntry = b.DocEntry
inner join OITW c on b.ItemCode = c.ItemCode
where
a.DocStatus = 'o' and a.CANCELED = 'n' and c.whscode = 
CASE when BPLId = 4 then '301' 
ELSE
'401'
END)

create table #tmp2 (
Docentry int
,qty int
,onhand int
,itemcode varchar(20)
)

note that in the first chunk of code I put there is the declaration of values, the cursor is still incomplete and I am using it "in hand" by selecting and clicking fetch next to test, so I found that only the first row is inserted in table #tmp2.

Thanks in advance!