Remember to re-schedule your modified process chain after you modify it and activate it

This may sound evident, but whenever a process chain is changed and activated it is removed from the scheduling. You see if it scheduled graphically when you enter in the process chain via transaction RSPC or RSPC1 and the different process variants show as green, if it is not scheduled it shows as grey or the default color.
So, whenever you change and modify a process change, remember to re-schedule it to avoid headaches the “day after”.

The button to schedule is in the toolbar right to the activate button.

Process Chain Activate Button

You can use Function Module RSPC_CHAIN_START to start the process chain without changing its current scheduling. In transaction SE37, enter RSPC_CHAIN_START in the Function Module field and click on the Test/Execute Button (F8)

Function Module RSPC_CHAIN_START, initial screen

Enter the name of the Process Chain on the field I_CHAIN and click on the “Execute” button (F8).