>
>This is my new code, it works fine.
>
>
>

>CREATE TRIGGER [ReceptionDetail$UPDATE] ON [dbo].[IN_ReceptionDetail]
>FOR UPDATE
>AS
>
>
>IF UPDATE(nQuantiteRecu)
>	BEGIN
>		UPDATE  IN_ItemEntrepot SET  nEnMainQuantite =  nEnMainQuantite - 
DELETED.nQuantiteRecu + INSERTED.nQuantiteRecu FROM IN_ItemEntrepot
>		JOIN INSERTED ON  INSERTED.fk_Item =  IN_ItemEntrepot.fk_Item 
AND  INSERTED.fk_Entrepot =  IN_ItemEntrepot.fk_Entrepot
>		JOIN DELETED ON DELETED.ID =  INSERTED.ID
>	END
>
>

>
>
>Do you see any beginner's error in there?
>And, in a trigger there is no current record pointing on a row?

No, there's no current record and there cannot be because a trigger fires once per a SQL statement not per a row.