Solution : https://service.sap.com/sap/support/notes/480161 (SAP Service marketplace login required)
Key words : 
system displays error message sy503, system terminates report sdewudeb, trfc luw exceeded, customer master data, crm system, terms sdewudeb, currency change, separate units, rfc connection, selection criteria
Related Notes : 
       
| 442478 | Installation of qRFC Version 6.20.043 | 
| 416125 | Error message VC462 due to lock table overflow | 
| 400330 | Outbound Scheduler/qOUT Scheduler |