If you’re a PeopleSoft programmer, the Error() function is probably one of the first function you learned in PeopleCode. Raising an error — via the Error or MessageBox functions — is an indispensable operation, and serves multiple purposes throughout the component processor flow. Aside from displaying a message to the user, issuing an error has an accompanying effect which depends on which PeopleCode event it occurs. In FieldEdit, it highlights the affected field and stops further processing; in SaveEdit, it is used to abort save processing (SavePreChange–Workflow–SavePostChange); in RowDelete, it is used to cancel the user delete action.