SAP ABAP Class CL_SR_INBOUND_RELATION_HANDLER (Services registry: Relation handler) is using

• Class (53)
• Data Element (29)
• Table/Structure Field (60)
• Interface (30)
• Message Class (3)
• Message Number (4)
• Class Method (69)
• Program (2)
• Table (26)

#	Object Type	Object Name	Object Description	Note
1	Message Number	MSG_CL_ER - 135	Entry with key-value combination already exists: &1 - &2
2	Message Number	MSG_CL_ER - 136	Object not available: &1
3	Message Number	MSG_CL_ER - 136	Object not available: &1
4	Message Number	MSG_CL_ER - 136	Object not available: &1