i have a problem that when I'm going to print the invoice (VF03), i have to check the field displayed e.g. port of loading, final destination should not be empty.If both are empty, when user is ready to print, then alert message is displayed (e.g. Please return to the invoice to fill in the port of loading / final destination) and is not allowed to print it out
i'm using Zxxxxx program (including the subroutine) and SAPScript form Zxxxxxx ,in the form, i use "PERFORM XXX IN PROGRAM ZXXXX" to call the parameter,so how can I do the alert message and stop the printing process and Do i write a checking subroutine in the program and perform that subroutine , so that when that required fields are empty, then show alert when printing?
PLs advise