Hello Dennis, >I have already solved the problem of the Deletion. Glad you got it working >But it have created a new problem. There is nothing new, "All new things are well forgotten old things" < g > >As i deleted a invoice and i add a new invoice with the same invoice no. (deleted previous), an error will be occured. (Primary key is not unique). How can i fix this problem ? In such a case, use reusing technique