LANSA upgrades are issued as EPCs (Expedited Program Changes).
The steps required and any pre-requisite EPCs are supplied with each EPC.
If an EPC requires another EPC to be loaded first, the load process will check for the existence of previously required EPCs. If a pre-requisite EPC is not present, the EPC loading procedure will fail.
You can see which EPCs have already been loaded using the F10=EPC Log function on the LANSA Configuration Details screen. You access the LANSA Configuration Details screen using the ABOUT parameter on the 1.4 LANSA Command. The EPC details can be displayed in EPC Number or Date/Time sequence and can be printed.