Sure you just need to have a different supplier product code (tab Suppliers, field ITMREFBPS) for each product record. By default the value is empty. So the system forbid you to have 2 empty supplier product code for the same supplier. The workaroud is easy, you need to enter a value, if you have none then you can use the Product code (ITMREF) to feed the supplier product code.

for one item i went to supplier and select the supplier which was fine .

then there is another item with the same supplier and when i try to pick him and save it already used ?

sorry didnt understand ur reply above

for one item i went to supplier and select the supplier which was fine .

then there is another item with the same supplier and when i try to pick him and save it already used ?

sorry didnt understand ur reply above

To make simple, the field highlighted in red should not be empty. Please enter a value and ensure there is no duplicate for the same supplier. By default enter the product code (ITMREF).

Great , Thanks man !!!