Here we would like to draw your attention to OION transaction code in SAP. As we know it is being used in the SAP PM (Plant Maintenance) module. OION is a transaction code used for Order number ranges in SAP.
It comes under the package INSC.When we execute this transaction code, SAPMSNUM is the normal standard SAP program that is being executed in background.
Transaction OION technical data table
|Purpose||Order number ranges|