diff --git a/builds/push_swap.o b/builds/push_swap.o
index 16c3d97..7118121 100644
Binary files a/builds/push_swap.o and b/builds/push_swap.o differ
diff --git a/builds/stop.o b/builds/stop.o
index 8f27a04..dfcc914 100644
Binary files a/builds/stop.o and b/builds/stop.o differ
diff --git a/push_swap b/push_swap
index a01a326..3fbf108 100755
Binary files a/push_swap and b/push_swap differ
diff --git a/srcs/push_swap.c b/srcs/push_swap.c
index e1d41e0..269e58a 100644
--- a/srcs/push_swap.c
+++ b/srcs/push_swap.c
@@ -1,13 +1,5 @@
 #include "push_swap.h"
 
-// check more error
-void	is_valid(int ac, char **av)
-{
-	if (ac < 2)
-		ps_stop(NULL, 1);
-	(void)av;
-}
-
 int	check_flag(int *ac, char ***av)
 {
 	if (ft_strcmp((*av)[1], "-p") == 0)
@@ -32,19 +24,16 @@ t_stack	*fill_stack(t_stack *list, char *nb)
 
 	new = ft_calloc(1, sizeof(t_stack));
 	if (!new)
-		ps_stop((t_list *)list, 2);
-
-/*
-	if (ft_isnumber(nb) == 0)
-		ps_stop((t_list *)list, 2);
-	nbl = ft_atol(nb);
-	if (nbl < INT_MIN || nbl > INT_MAX)
-		ps_stop((t_list *)list, 2);
-	new->n = nbl;
-	new->limit = 0;
+		ps_stop((t_list *)list, 3);
 	new->next = list;
 	list = new;
-*/
+	if (ft_isnumber(nb) == 0)
+		ps_stop((t_list *)list, 3);
+	nbl = ft_atol(nb);
+	if (nbl < INT_MIN || nbl > INT_MAX)
+		ps_stop((t_list *)list, 3);
+	list->n = nbl;
+	list->limit = 0;
 	return (list);
 }
 
@@ -102,7 +91,8 @@ int	main(int ac, char **av)
 	t_list		*solution;
 	int			flag;
 
-	is_valid(ac, av);
+	if (ac < 2)
+		ps_stop(NULL, 1);
 	flag = check_flag(&ac, &av);
 	a = init_stack(ac, av);
 	b = NULL;
diff --git a/srcs/stop.c b/srcs/stop.c
index bc3e803..2f0b264 100644
--- a/srcs/stop.c
+++ b/srcs/stop.c
@@ -4,22 +4,22 @@ void	ps_error(int err)
 {
 	if (err == 1)
 		ft_printf("usage :\nlaunch executable : ./push_swap [flag -p] nb nb nb nb nb ...\n");
-	if (err == 2)
+	if (err >= 2)
 		ft_putstr_fd("Error\n", 2);
 	exit(0);
 }
 
 /*
-** if err < 0, the parameter list is just a t_stack *list
 ** if err = 0, the list are freed but the program doesn't stop
-** if err > 0, a message is printed and the program stop
+** if err = 1, 2 or 3, a message is printed and the program stop
+** if err = 3, the parameter list is just a t_stack *list
 */
 void	ps_stop(t_list *lst, int err)
 {
 	t_stack	**a;
 	t_stack	**b;
 
-	if (err < 0)
+	if (err == 3)
 		ft_lstclear(&lst, NULL);
 	else if (lst)
 	{
diff --git a/tester.sh b/tester.sh
index 1402dda..0e675b9 100644
--- a/tester.sh
+++ b/tester.sh
@@ -12,15 +12,19 @@ WHITE='\033[1;37m'
 NC='\033[0m'
 
 # usage of arguments
-if [ $# -eq 2 ]
+if [ $# -eq 1 ]
 then
-	PRGM=$1		# path to program
-	SIZE=$2		# size of the list
+	SIZE=$1		# size of the list
+elif [ $# -eq 2 ]
+then
+	FLAG=$1		# flag for leaks and errors // not in use so far
+	SIZE=$2
 else
 	echo "usage : ./tester.sh path/to/push_swap size_of_list"
 	exit 0
 fi
 
+PRGM=push_swap	# path to program
 # range of random numbers
 RANGE=$(($SIZE * 2))