If you tried manually or schedule in LD 43 Bkr 2,3,4 or whatever rule for SCS backup and you get SRPT4640 failed error. It's because your remote location is either a CPDC or CPMG cores. Meaning it works with linux. You have your Signaling server and Call server on the same card.
Go in Linux Base Manager - Route Table
Add the IP of the Main Call Server with the ELAN gateway of the remote site NOT the ELAN gateway of the Main Call Server. Leave it with 255.255.255.255 even if it's not right from your sheets and save it.
That should fix your SCS schedule backups from failing. Sorry leaving it here for future reference.