!!!UNDISBURSE PAY RUNS In situations where UPDISBV has been executed and must be backed out, the Undisburse Vendor Payments (UPUNDISB) screen can be executed to ‘Undo’ the work from a previous execution of UPDISBV. UPUNDISB can also be used to undo executions of regular employee UPCALC executions. One or more pay runs can be handled in one execution of UPUNDISB.