Here we would like to draw your attention to SWUN transaction code in SAP. As we know it is being used in the SAP BC-BMT (Business Management in Basis) component which is coming under BC module (BASIS).SWUN is a transaction code used for Number Range Maintenance: FORMABSENC in SAP.
It comes under the package SWX.When we execute this transaction code, SAPMSNUM is the normal standard SAP program that is being executed in background.
Transaction SWUN technical data table
|Purpose||Number Range Maintenance: FORMABSENC|