Solution : https://service.sap.com/sap/support/notes/621225 (SAP Service marketplace login required)
Key words : 
contract assignment dialog box, attached correction instructions, contract transfer reason, contract assignment' pushbutton, terms contract determination, dialog box, contract assignment, contract determination, header level, service transaction
Related Notes : 
       
| 634869 | SAPKU40001: Support Package 01 for CRM 4.0 |