I am building connection between S/4HANA on-prem and SAP SCP Enterprise Messaging service.
I've completed all related customizing on both ends (up till creating a queue subscription) and able to see S/4 events from SCP.
However, there is no messages come to SCP after I change related objects in S/4.
Error log SAPLSHI01 is empty. Application log SLG1 also has no related records.
What would be the best way to find the reason?