cursor update problem

[timmoser]

I have a SP that contains a cursor with an inner cursor. The SP works mostly but in the inner cursor I get an error after it updates the first record. Below is the info:

Error:

[COLOR=red]
"Error:  Number (560) Severity (16) State (1) Procedure (_test) 
The UPDATE/DELETE WHERE CURRENT OF failed for the cursor 'my_curse_bos' 
because it is not positioned on a row."
[/color]

[COLOR=blue]
DECLARE my_curse_def CURSOR FOR (SELECT part, qty FROM #availdef )
DECLARE @reccount INT
OPEN my_curse_def
FETCH my_curse_def into @part, @def_qty

WHILE (@@sqlstatus = 0)
BEGIN
SELECT @varqty=@def_qty
SELECT @reccount=0
SELECT @reccount = (SELECT COUNT(*) FROM #bosiwant WHERE part=@part)

DECLARE my_curse_bos CURSOR FOR (SELECT part, qty_ord, allocate, asl_ord, t_num, line FROM #bosiwant WHERE part=@part) FOR UPDATE OF allocate 
OPEN my_curse_bos  
FETCH my_curse_bos into @curPart, @qty_ord, @allocate, @asl_ord, @t_num, @line   
    
    WHILE (@reccount>0)
    BEGIN
   
        IF  @varqty>0
        BEGIN
             IF @qty_ord>=@varqty  
             BEGIN
                update #bosiwant
                set allocate = @varqty
                [COLOR=red]where current of my_curse_bos[/color]
                SELECT @varqty=0
             END
	ELSE
             BEGIN
                update #bosiwant
                set allocate = @qty_ord
                [COLOR=red]where current of my_curse_bos[/color]
                SELECT @varqty=@varqty-@qty_ord
             END   
        END
   
        FETCH my_curse_bos into @curPart, @qty_ord, @allocate, @asl_ord, @t_num, @line

	SELECT @reccount=@reccount-1

    END

    CLOSE my_curse_bos
    deallocate cursor my_curse_bos        

FETCH my_curse_def into @part, @def_qty

END

close my_curse_def
deallocate cursor my_curse_def 
[/color]

It actually does update the first record of the inner cursor; seems like after the update the cursor is no more.

Thanks for your thoughs.