Solution : https://service.sap.com/sap/support/notes/610899 (SAP Service marketplace login required)
Key words : 
attached source code corrections, symptom partner functions, terms bp_exchange_r3_to_crm reason, initial load, object customer_rel, crm server, data exchange, implemented manually, support package, solution implement
Related Notes : 
       
| 634869 | SAPKU40001: Support Package 01 for CRM 4.0 | 
| 578358 |